Deutoronomy 30:6-20 “Moreover the Lord your God will circumcise your heart and the heart of your [f]descendants, to love the Lord your God with all your heart and with all your soul, so that you may live. 7 The Lord your God will [g]inflict all these curses on your enemies and on those who hate you, who persecuted you. 8 And you shall again [h]obey the Lord, and observe all His commandments which I command you today. 9 Then the Lord your God will prosper you abundantly in all the work of your hand, in the [j]offspring of your [k]body and in the [l]offspring of your cattle and in the [m]produce of your ground, for the Lord will again rejoice over you for good, just as He rejoiced over your fathers; 10 [n]if you [o]obey the Lord your God to keep His commandments and His statutes which are written in this book of the law, [p]if you turn to the Lord your God with all your heart and soul.
“Moreover the Lord your God will circumcise your heart and the heart of your [f]descendants, to love the Lord your God with all your heart and with all your soul, so that you may live. 7 The Lord your God will [g]inflict all these curses on your enemies and on those who hate you, who persecuted you. 8 And you shall again [h]obey the Lord, and observe all His commandments which I command you today. 9 Then the Lord your God will prosper you abundantly in all the work of your hand, in the [j]offspring of your [k]body and in the [l]offspring of your cattle and in the [m]produce of your ground, for the Lord will again rejoice over you for good, just as He rejoiced over your fathers; 10 [n]if you [o]obey the Lord your God to keep His commandments and His statutes which are written in this book of the law, [p]if you turn to the Lord your God with all your heart and soul.
11 “For this commandment which I command you today is not too difficult for you, nor is it [q]out of reach. 12 It is not in heaven, [r]that you should say, ‘Who will go up to heaven for us to get it for us and make us hear it, that we may observe it?’ 13 Nor is it beyond the sea, that you should say, ‘Who will cross the sea for us to get it for us and make us hear it, that we may observe it?’ 14 But the word is very near you, in your mouth and in your heart, that you may observe it.
15 “See, I have set before you today life and [t]prosperity, and death and adversity; 16 in that I command you today to love the Lord your God, to walk in His ways and to keep His commandments and His statutes and His judgments, that you may live and multiply, and that the Lord your God may bless you in the land where you are entering to possess it. 17 But if your heart turns away and you will not obey, but are drawn away and worship other gods and serve them, 18 I declare to you today that you shall surely perish. You will not prolong your days in the land where you are crossing the Jordan to enter [v]and possess it. 19 I call heaven and earth to witness against you today, that I have set before you life and death, the blessing and the curse. So choose life in order that you may live, you and your [w]descendants, 20 by loving the Lord your God, by obeying His voice, and by holding fast to Him; for [x]this is your life and the length of your days, [y]that you may live in the land which the Lord swore to your fathers, to Abraham, Isaac, and Jacob, to give them.
From the very beginning man has been capable of fulfilling the Law. The Law is, at its core, love. If you love God and your fellow man, truly - not just in word but in deed - then you fulfill the Law. This is a matter of the heart. If one's heart and mind are set on God and doing what is right, such a one is fully capable of pleasing God. However, one who sets their hearts and mind on worldly desires - it is impossible for them to please God.
Romans 8:5-8 For those who are according to the flesh set their minds on the things of the flesh, but those who are according to the Spirit, the things of the Spirit. 6 For the mind set on the flesh is death, but the mind set on the Spirit is life and peace, 7 because the mind set on the flesh is hostile toward God; for it does not subject itself to the law of God, for it is not even able to do so, 8 and those who are in the flesh cannot please God.
But yes - it is in Christ that we find the fulfillment of the Law, the embodiment of God's Love.