'Know' in the Bible

But we know that the law is good, provided one uses it legitimately.

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,

(If anyone does not know how to manage his own household, how will he take care of God’s church?)

But if I should be delayed, I have written so that you will know how people ought to act in God’s household, which is the church of the living God, the pillar and foundation of the truth.

They forbid marriage and demand abstinence from foods that God created to be received with gratitude by those who believe and know the truth.