'Know' in the Bible

That indeed is the reason why I suffer as I do. But I am not ashamed, for I know in whom my trust reposes, and I am confident that He has it in His power to keep what I have entrusted to Him safe until that day.

And you yourself well know all the services which he rendered me in Ephesus.

and the persecutions and sufferings which I have endured; the things which happened to me in Antioch, Iconium and Lystra. You know the persecutions I endured, and how the Lord delivered me out of them all.