John 8:43
Why do ye not understand My speech? it is because ye cannot hear My word.
Romans 3:11
there is none that understands; there is none that seeks after God;
1 Corinthians 6:16
Or know ye not that he who is united to the harlot is one body? For, "the two", He saith, "shall be one flesh";
Ephesians 4:18
being darkened in their understanding, alienated from the life of God because of the ignorance that is in them, because of the hardness of their hearts;
Hebrews 12:8
But, if ye are without chastisement, of which all have become partakers, then are ye bastards, and not sons.