JudoMinja thanks for the reply Well in this sense of the word prove: To find out, learn, or know by experience; to have experience of, to experience, ‘go through’, suffer; also with compl., to find by experience (a person or thing) to be (something) as the Lord did with Abraham. Gen:22:12: And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me. And so does the Lord God do with all His chosen. Or in the sense of to make trial of, put to the test; to try the genuineness or qualities of; to try, test. arch. exc. in technical uses. Isn’t the genuineness or qualities of tested by fire? Mt:3:11: I indeed baptize you with water unto repentance: but he that cometh after me is mightier than I, whose shoes I am not worthy to bear: he shall baptize you with the Holy Ghost, and with fire: I believe God proves us to be His, by testing or proving out that which is of Him is in us. Of which He could easily see and or recognize. ( I used OED in reliance of the “King’s English” since I read KJV and nether change.)