'Knew' in the Bible

“Before I formed you in the womb I knew you,And before you were born I consecrated you;I have appointed you a prophet to the nations.”

Moreover, the Lord made it known to me and I knew it;Then You showed me their deeds.

Then Hanamel my uncle’s son came to me in the court of the guard according to the word of the Lord and said to me, ‘Buy my field, please, that is at Anathoth, which is in the land of Benjamin; for you have the right of possession and the redemption is yours; buy it for yourself.’ Then I knew that this was the word of the Lord.

Now it happened on the next day after the killing of Gedaliah, when no one knew about it,