'Know' in the Bible

But we know that the law is good, if a man use it lawfully;

We know that the law is not meant for a righteous person, but for the lawless and rebellious, for the ungodly and sinful, for the unholy and irreverent, for those who kill their fathers and mothers, for murderers,

who wants all people to be saved and to come to know the truth fully.

(For if a man know not how to rule his own house, how shall he take care of the church of God?)

But if I tarry long, that thou mayest know how thou oughtest to behave thyself in the house of God, which is the church of the living God, the pillar and ground of the truth.

Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.