John 8:43
Wherefore do ye not understand my speech? 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
Do you not know that he that is joined to an harlot is one body with her? For they two, saith he, shall be "one flesh."
Ephesians 4:18
darkened in understanding; alienated from the life of God through the ignorance which is in them; through the blindness of their hearts:
Hebrews 12:8
If then ye are without correction, of which all are partakers, then are ye bastards, and not children.