Matthew 13:15

Because the heart of this people is waxed gross, and they heard heavily with their ears, and closed their eyes; lest they may see with their eyes, and hear with their ears, and understand with their hearts, and turn, and I shall heal them.

Romans 3:11

there is no one who understands, there is no one who seeks out God;

Hebrews 11:6

but without faith it is impossible to please him: for it behooves the one coming unto God to believe that he is, and he is a rewarder unto them who seek him out.

Treasury of Scripture Knowledge

Summary

The LORD looked down from heaven upon the children of men, to see if there were any that did understand, and seek God.

Bible References

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Matthew 13:15
Because the heart of this people is waxed gross, and they heard heavily with their ears, and closed their eyes; lest they may see with their eyes, and hear with their ears, and understand with their hearts, and turn, and I shall heal them.
Romans 3:11
there is no one who understands, there is no one who seeks out God;