John 8:43
Why do ye not understand my discourse? Even because ye cannot hear my word.
Romans 3:11
There is none that understandeth; there is none that seeketh after God.
1 Corinthians 6:16
God forbid. Know ye not, that he who is joined to an harlot is one body? For they two, saith he, shall be one flesh.
Ephesians 4:18
Having the understanding darkened, being alienated from the life of God, by the ignorance that is in them, through the hardness of their hearts:
Hebrews 12:8
But if ye are without chastning, of which all are partakers, then are ye bastards and not sons.