'Know' in the Bible

But wilt thou know, O vain man, that faith without works is dead?

Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God.

Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away.

Let him know, that he which converteth the sinner from the error of his way shall save a soul from death, and shall hide a multitude of sins.