'Think' in the Bible

Watch your step whenever you visit God's house, and come more ready to listen than to offer a fool's sacrifice, since fools never think they're doing evil.

For he does not think much about the fleeting days of his life because God keeps him preoccupied with the joy he derives from his activity.

Then I beheld all the work of God, that a man cannot find out the work that is done under the sun: because though a man labour to seek it out, yet he shall not find it; yea further; though a wise man think to know it, yet shall he not be able to find it.