O righteous Father, the world hath not known thee: but I have known thee, and these have known that thou hast sent me. The world hath not known thee - Has not acknowledged me. See on John 1:11, John 1:12 (note).
And these have known - Here our Lord, returning to the disciples, speaks:
1st. Of their having received him as the Messiah;
2dly. Of his making the Father known unto them;
3dly. Of his purpose to continue to influence them by the Spirit of truth, that they might be perfectly united to God, by an indwelling Savior for ever.