'Knows' in the Bible

He who has an ear, let him hear and heed what the Spirit says to the churches. To him who overcomes [the world through believing that Jesus is the Son of God], to him I will give [the privilege of eating] some of the hidden manna, and I will give him a white stone with a new name engraved on the stone which no one knows except the one who receives it.’

Therefore rejoice, O heavens and you who dwell in them [in the presence of God]. Woe to the earth and the sea, because the devil has come down to you in great wrath, knowing that he has only a short time [remaining]!”

His eyes are a flame of fire, and on His head are many royal crowns; and He has a name inscribed [on Him] which no one knows or understands except Himself.