John 8:43
Why do ye not understand my language? It is because ye cannot listen to my word.
Romans 3:11
there is none that hath understanding, there is none that diligently seeketh God;
1 Corinthians 6:16
Know ye not, that he who is connected with a harlot is one body with her? "For the two," saith he, "shall become one flesh;"
Ephesians 4:18
having their understanding darkened, being alienated from the life of God on account of the ignorance that is in them, on account of the hardness of their hearts;
Hebrews 12:8
But if ye are without chastening, of which all have been made partakers, then are ye bastards and not sons.