"For by one offering he hath perfected for ever them that are sanctified." (Hebrews 10: 14)
This verse, this promise, is hard for some people to accept.
We are perfected. How? In our actions.
No, because if that were the case, then we would not have to be transformed from glory to glory:
"But we all, with open face beholding as in a glass the glory of the Lord, are changed into the same image from glory to glory, even as by the Spirit of the Lord." (2 Corinthians 3: 18)
"1Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not. 2Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is." (1 John 3: 1-2)
We are born again in our spirit, and even if our outside is growing old, on the inside we are renewed from day to day:
"For which cause we faint not; but though our outward man perish, yet the inward man is renewed day by day." (2 Corinthians 4: 16)
So, we are made righteous by our position, because God the Father has seated us in heavenly places in Christ Jesus.
He sees us, and He sees His Son, because we are in Him today.
So, even if we had a bad father growing up, we can trust that God our Father is so much better:
"21Thou shalt neither vex a stranger, nor oppress him: for ye were strangers in the land of Egypt. 22Ye shall not afflict any widow, or fatherless child. 23If thou afflict them in any wise, and they cry at all unto me, I will surely hear their cry; 24And my wrath shall wax hot, and I will kill you with the sword; and your wives shall be widows, and your children fatherless." (Exodus 22: 21-23)
"For the LORD your God is God of gods, and Lord of lords, a great God, a mighty, and a terrible, which regardeth not persons, nor taketh reward: 18He doth execute the judgment of the fatherless and widow, and loveth the stranger, in giving him food and raiment. " (Deuteronomy 10: 17-18)
"A father of the fatherless, and a judge of the widows, is God in his holy habitation." (Psalm 68: 5)
So, if you had a bad father, it does not matter, because your Heavenly Father is waiting for your to receive and rest in His Spirit of Adoption for You:
"For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father." (Romans 8: 15)
"Herein is our love made perfect, that we may have boldness in the day of judgment: because as he is, so are we in this world." (1 John 4: 17)