How were they perfected forever according to Heb 10:14
14 For by one offering he hath perfected for ever them that are sanctified.
		
		
	 
Amen!
Romans 8:15 For you did not receive a spirit that makes you a slave again to fear, buy you received the Spirit of sonship. And by him we cry, "Abba, father. The Spirit himself testifies with our spirit that we are God's children. Now if we are children, then we are heirs--heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory. 
Romans 9:16 It does not, therefore, depend on man's desire or effort but on God's mercy.
Romans 10:9 That if you confess with your mouth that "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. 
Romans 10:13 for "Everyone who calls on the name of the Lord will be saved."
Ephesians, 2:4 But because of his great love for us, God, who is rich in mercy, made us alive in Christ even when we were dead in transgressions--it is by grace you have been saved. 
(NIV)
I'm not sure where we disagree. God saves. Indeed, God reconciled believers to himself while still enemies. These people are the elect, the saved, brought by grace to believe in Christ, known by God, made as they are by God. God saves, God perfects. Where is the controversy for anybody who reads Scripture and believes in their heart?
The Chosen are perfected forever, but how lowly are all of them are compared to God. Every Christian struggles and suffers. Some of them have done filthy things. And yet still they are perfect because of how God made them! Through God's grace they submit themselves to Christ.