We do know

1. John 3: 11
     11 Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.
2. 1 Jn. 2: 3
     3 And hereby we do know that we know him, if we keep his commandments.
3. Alma 18: 3
     3 And they answered the king, and said: Whether he be the Great Spirit or a man, we know not; but this much we do know, that he cannot be slain by the enemies of the king; neither can they scatter the king’s flocks when he is with us, because of his expertness and great strength; therefore, we know that he is a friend to the king. And now, O king, we do not believe that a man has such great power, for we know he cannot be slain.
4. Alma 58: 34-35
     34 Now we do not know the cause that the government does not grant us more strength; neither do those men who came up unto us know why we have not received greater strength.
     35 Behold, we do not know but what ye are unsuccessful, and ye have drawn away the forces into that quarter of the land; if so, we do not desire to murmur.