'Mightest' in the Bible

and that thou mightest tell in the ears of thy son and thy son's son what I have wrought in Egypt, and my signs which I have done among them; and ye shall know that I am Jehovah.

Unto thee it was shewn, that thou mightest know that Jehovah, he is God there is none other besides him.

And Eliab, his eldest brother, heard while he spoke to the men; and Eliab's anger was kindled against David, and he said, Why art thou come down? and with whom hast thou left those few sheep in the wilderness? I know thy pride and the naughtiness of thy heart; for thou art come down that thou mightest see the battle.

And thou testifiedst against them, that thou mightest bring them again unto thy law; but they dealt proudly, and hearkened not unto thy commandments, but sinned against thine ordinances (which if a man do, he shall live in them); and they withdrew the shoulder, and hardened their neck, and would not hear.

that I might make thee know the certainty of the words of truth; that thou mightest carry back words of truth to them that send thee?

And as for me, this secret is revealed to me, not by any wisdom that I have more than any living, but to the intent that the interpretation should be made known to the king, and that thou mightest know the thoughts of thy heart.