Hebrews 5:14

but solid food belongs to the perfect, those having their senses disciplined by use unto the discernment both of the good and the evil.

1 Corinthians 2:6

But we speak wisdom among the perfect: not the wisdom of this age, nor of the rulers of this age, who are coming to nought:

Ephesians 4:13

until we may all come into the unity of the faith, and of the perfect knowledge of the Son of God, into a perfect man, into the measure of the likeness of the fulness of Christ:

Romans 14:1

But receive to yourselves him who is weak in faith, not into disputations of doubtful matters.

Matthew 5:48

Therefore ye shall be perfect, as your Father who is in heaven is perfect.

Matthew 6:22-23

For the light of the body is the eye. If thine eye may be clear, thy whole body will he lighted.

1 Corinthians 2:14-15

But the intellectual man receives not the things of the Spirit of God; for they are foolishness unto him; and he is not able to know them, because they are spiritually discerned.

Ephesians 1:18

the eyes of your heart having been enlightened, that you may know what is the hope of his calling, what the riches of the glory of his inheritance among the saints,

Philippians 1:9-10

And I pray this, that your divine love may yet more and more abound in perfect knowledge and all understanding;

Philippians 3:15

Therefore let us, so many as are perfect, think the same thing: and if you think otherwise in any respect, God will also reveal this to you:

1 Thessalonians 5:21

but prove all things; and hold fast to the beautiful;

James 3:2

For we all fail in many things; if any one fails not in word, the same is a perfect man, able even to bridle the whole body.

Treasury of Scripture Knowledge

Summary

But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.

Bible References

Their

Matthew 6:22
For the light of the body is the eye. If thine eye may be clear, thy whole body will he lighted.
Ephesians 1:18
the eyes of your heart having been enlightened, that you may know what is the hope of his calling, what the riches of the glory of his inheritance among the saints,

To discern

Romans 14:1
But receive to yourselves him who is weak in faith, not into disputations of doubtful matters.
Philippians 1:9
And I pray this, that your divine love may yet more and more abound in perfect knowledge and all understanding;