Galatians 3:25 But after faith has come, we are no longer under a tutor.
Before we accept Christ as our Saviour, we are still very much in a learning role where we are trying to understand many things; for that we do need a teacher to help us to understand things.
But when we trust in Christ, He has promised to give us the Holy Spirit to give us the understanding that we desire.
After be trust in Christ we are no longer stuck as a scholar seeking something new, but rather we grow in our own time as we learn for ourselves from the Holy Spirit. We grow from being like a scholar to being more like an undergraduate.