Matthew 13:13-15
Therefore I speak to them in parables, because seeing they see not, and hearing they hear not, nor understand.
Matthew 13:19
When any one heareth the word of the kingdom, and understandeth it not, the Evil One cometh, and snatcheth away that which was sown in his heart; this man is what was sown by the wayside.
Romans 1:28
And as they did not choose to retain God in their knowledge, God gave them up to a reprobate mind, to do things which are shameful;
2 Peter 3:5
For of this they are willingly ignorant, that of old by the word of God there were heavens, and an earth formed out of the water and by the water,