John 8:43
Why do you not understand my speech? because you cannot hear my word.
Romans 3:11
there is none that understands, there is none that seeks God;
1 Corinthians 6:16
Know you not that he who is joined to a harlot is one body [with her]? For the two, says he, shall be one flesh.
Ephesians 4:18
with their understandings darkened, alienated from the life of God on account of the ignorance which is in them, on account of the hardness of their hearts,
Hebrews 12:8
But if you are without correction of which all are partakers, then you are of foreign birth, and not sons.