What does “when the perfect comes” mean in 1 Corinthians 13:9-10?
Perhaps the following quotes from a couple of commentaries will help answer your question.
First from The Bible Knowledge Commentary:
13:9-10. As Paul explained it, the gift of knowledge (v. 8), essential as it was, was not exhaustive. The ability to prophesy, however crucial for the church’s life, was of limited scope. The gifts were temporary blessings in an imperfect age. One day they would give way to perfection, toward which all the gifts pointed.