'Acknowledge' in the Bible

He who overcomes [the world through believing that Jesus is the Son of God] will accordingly be dressed in white clothing; and I will never blot out his name from the Book of Life, and I will confess and openly acknowledge his name before My Father and before His angels [saying that he is one of Mine].

Take note, I will make those of the synagogue of Satan, who say that they are Jews and are not, but lie—I will make them come and bow down at your feet and make them know [without any doubt] that I have loved you.