He's also forgiven us of all sins we might commit in the future or are committing.
Because He was teaching law, not grace, to Israel, not the Body of Christ (which didn't even exist yet).
Paul teaches forgive because we are
already forgiven,
not so that we
will be forgiven.
Not according to me. According to the Bible, and Jesus Himself.
Jesus resisted ministering to the Gentiles during His ministry.
He refused help to the gentile woman who's daughter was demon possessed:
Then Jesus went out from there and departed to the region of Tyre and Sidon.And behold, a woman of Canaan came from that region and cried out to Him, saying, “Have mercy on me, O Lord, Son of David! My daughter is severely demon-possessed.”But He answered her not a word. And His disciples came and urged Him, saying, “Send her away, for she cries out after us.”But He answered and said, “I was not sent except to the lost sheep of the house of Israel.”Then she came and worshiped Him, saying, “Lord, help me!”But He answered and said, “It is not good to take the children’s bread and throw it to the little dogs.”And she said, “Yes, Lord, yet even the little dogs eat the crumbs which fall from their masters’ table.”Then Jesus answered and said to her, “O woman, great is your faith! Let it be to you as you desire.” And her daughter was healed from that very hour. - Matthew 15:21-28
http://www.biblegateway.com/passage/?search=Matthew15:21-28&version=NKJV
And
From there He arose and went to the region of Tyre and Sidon. And He entered a house and wanted no one to know it, but He could not be hidden.For a woman whose young daughter had an unclean spirit heard about Him, and she came and fell at His feet.The woman was a Greek, a Syro-Phoenician by birth, and she kept asking Him to cast the demon out of her daughter.But Jesus said to her, “Let the children be filled first, for it is not good to take the children’s bread and throw it to the little dogs.”And she answered and said to Him, “Yes, Lord, yet even the little dogs under the table eat from the children’s crumbs.”Then He said to her, “For this saying go your way; the demon has gone out of your daughter.”And when she had come to her house, she found the demon gone out, and her daughter lying on the bed. - Mark 7:24-30
http://www.biblegateway.com/passage/?search=Mark7:24-30&version=NKJV
He refused to help the centurion who's servant was sick:
Now when Jesus had entered Capernaum, a centurion came to Him, pleading with Him,saying, “Lord, my servant is lying at home paralyzed, dreadfully tormented.”And Jesus said to him, “I will come and heal him.”The centurion answered and said, “Lord, I am not worthy that You should come under my roof. But only speak a word, and my servant will be healed.For I also am a man under authority, having soldiers under me. And I say to this one, ‘Go,’ and he goes; and to another, ‘Come,’ and he comes; and to my servant, ‘Do this,’ and he does it. ”When Jesus heard it, He marveled, and said to those who followed, “Assuredly, I say to you, I have not found such great faith, not even in Israel!And I say to you that many will come from east and west, and sit down with Abraham, Isaac, and Jacob in the kingdom of heaven.But the sons of the kingdom will be cast out into outer darkness. There will be weeping and gnashing of teeth.”Then Jesus said to the centurion, “Go your way; and as you have believed, so let it be done for you.” And his servant was healed that same hour. - Matthew 8:5-13
http://www.biblegateway.com/passage/?search=Matthew8:5-13&version=NKJV
And
Now when He concluded all His sayings in the hearing of the people, He entered Capernaum.And a certain centurion’s servant, who was dear to him, was sick and ready to die.So when he heard about Jesus, he sent elders of the Jews to Him, pleading with Him to come and heal his servant.And when they came to Jesus, they begged Him earnestly, saying that the one for whom He should do this was deserving,“for he loves our nation, and has built us a synagogue.”Then Jesus went with them. And when He was already not far from the house, the centurion sent friends to Him, saying to Him, “Lord, do not trouble Yourself, for I am not worthy that You should enter under my roof.Therefore I did not even think myself worthy to come to You. But say the word, and my servant will be healed.For I also am a man placed under authority, having soldiers under me. And I say to one, ‘Go,’ and he goes; and to another, ‘Come,’ and he comes; and to my servant, ‘Do this,’ and he does it. ”When Jesus heard these things, He marveled at him, and turned around and said to the crowd that followed Him, “I say to you, I have not found such great faith, not even in Israel!”And those who were sent, returning to the house, found the servant well who had been sick. - Luke 7:1-10
http://www.biblegateway.com/passage/?search=Luke7:1-10&version=NKJV
In both instances, the only reason Jesus did a miracle for them was because of their great faith. There are more, but I'm too tired to look for them right now.
So you're still a sinner? You mean, you reject that you have died to sin and Christ lives in you? Are you not justified by Christ?
What shall we say then? Shall we continue in sin that grace may abound?Certainly not! How shall we who died to sin live any longer in it?Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death?Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life.For if we have been united together in the likeness of His death, certainly we also shall be in the likeness of His resurrection,knowing this, that our old man was crucified with Him, that the body of sin might be done away with, that we should no longer be slaves of sin.For he who has died has been freed from sin.Now if we died with Christ, we believe that we shall also live with Him,knowing that Christ, having been raised from the dead, dies no more. Death no longer has dominion over Him.For the death that He died, He died to sin once for all; but the life that He lives, He lives to God.Likewise you also, reckon yourselves to be dead indeed to sin, but alive to God in Christ Jesus our Lord.Therefore do not let sin reign in your mortal body, that you should obey it in its lusts.And do not present your members as instruments of unrighteousness to sin, but present yourselves to God as being alive from the dead, and your members as instruments of righteousness to God.For sin shall not have dominion over you, for you are not under law but under grace.What then? Shall we sin because we are not under law but under grace? Certainly not!Do you not know that to whom you present yourselves slaves to obey, you are that one’s slaves whom you obey, whether of sin leading to death, or of obedience leading to righteousness?But God be thanked that though you were slaves of sin, yet you obeyed from the heart that form of doctrine to which you were delivered.And having been set free from sin, you became slaves of righteousness.I speak in human terms because of the weakness of your flesh. For just as you presented your members as slaves of uncleanness, and of lawlessness leading to more lawlessness, so now present your members as slaves of righteousness for holiness.For when you were slaves of sin, you were free in regard to righteousness.What fruit did you have then in the things of which you are now ashamed? For the end of those things is death.But now having been set free from sin, and having become slaves of God, you have your fruit to holiness, and the end, everlasting life.For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord. - Romans 6:1-23
http://www.biblegateway.com/passage/?search=Romans6:1-23&version=NKJV
Then why do you still call yourself a sinner?
But when I saw that they were not straightforward about the truth of the gospel, I said to Peter before them all, “If you, being a Jew, live in the manner of Gentiles and not as the Jews, why do you compel Gentiles to live as Jews?We who are Jews by nature, and not sinners of the Gentiles,knowing that a man is not justified by the works of the law but by faith in Jesus Christ, even we have believed in Christ Jesus, that we might be justified by faith in Christ and not by the works of the law; for by the works of the law no flesh shall be justified. “
But if, while we seek to be justified by Christ, we ourselves also are found sinners, is Christ therefore a minister of sin? Certainly not! For if I build again those things which I destroyed, I make myself a transgressor.For I through the law died to the law that I might live to God.I have been crucified with Christ; it is no longer I who live, but Christ lives in me; and the life which I now live in the flesh I live by faith in the Son of God, who loved me and gave Himself for me.I do not set aside the grace of God;
for if righteousness comes through the law, then Christ died in vain.” - Galatians 2:14-21
http://www.biblegateway.com/passage/?search=Galatians2:14-21&version=NKJV
24. And let us consider one another to provoke unto love and to good works: 25. Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching. 26. For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, 27. But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries. 28. He that despised Moses' law died without mercy under two or three witnesses: 29. Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace? 38. Now the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him. 39. But we are not of them who draw back unto perdition; but of them that believe to the saving of the soul. 
