'Known' in the Bible

but if any one loves God, that man is known by God.

For the present we see things as if in a mirror, and are puzzled; but then we shall see them face to face. For the present the knowledge I gain is imperfect; but then I shall know fully, even as I am fully known.

Even inanimate things--flutes or harps, for instance--when yielding a sound, if they make no distinction in the notes, how shall the tune which is played on the flute or the harp be known?