'Seek' in the Bible

And I have given my heart to seek and to search out by wisdom concerning all that hath been done under the heavens. It is a sad travail God hath given to the sons of man to be humbled by it.

A time to seek, And a time to destroy. A time to keep, And a time to cast away.

I have turned round, also my heart, to know and to search, and to seek out wisdom, and reason, and to know the wrong of folly, and of foolishness the madness.

then I considered all the work of God, that man is not able to find out the work that hath been done under the sun, because though man labour to seek, yet he doth not find; and even though the wise man speak of knowing he is not able to find.