For we know in part, and we prophesy in part.
In part - partially and imperfectly. Compare a similar contrast to the "perfect man," Ephesians 4:11-13.
That which is in part - fragmentary and isolated.
Related Commentaries of 1 Corinthians 13:9
1 Corinthians 13:9-10
9 For we know in part, and we prophesy in part.
10 But when that which is perfect is come, then that which is in part shall be done away.d