Perfect by God is considered to be the heart.
Eze 11:19And I will give them one heart, and I will put a new spirit within you; and I will take the stony heart out of their flesh, and will give them an
heart of flesh:
1Ki 11:4 For it came to pass, when Solomon was old, [that] his wives turned away his heart after other gods: and
his heart
was not perfect with the LORD his God, as [was] the heart of David his father.
1Ki 15:3 And he walked in all the sins of his father, which he had done before him:
and his heart was not perfect with the
LORD his God, as the heart of David his father.
2Ch 19:9 And he charged them, saying, Thus shall ye do in the fear of the LORD, faithfully, and
with a perfect heart.
Isa 38:3 And said, Remember now, O LORD, I beseech thee, how I have walked before thee in truth and
with a perfect heart,
and have done [that which is] good in thy sight. And Hezekiah wept sore.
Mat 5:44 But I say unto you,
Love your enemies, bless them that curse you, do good to them that hate you, and pray for them
which despitefully use you, and persecute you;
Mat 5:48 Be ye
therefore perfect, even as your Father which is in heaven is perfect.
Rom 12:2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what
[is] that good, and acceptable, and
perfect, will of God.
Phl 3:15 Let us therefore, as many
as be perfect, be thus minded: and if in any thing ye be