You don't evolve the capacity to learn lessons, you learn it.
There is no need to learn lessons, in a selective way, every lesson from God, is fit for "learning".
There will never be a lesson, that makes other lessons redundant, if they are all from God.
Because there are lessons, the student gains knowledge, knowledge that establishes the student in a relation with God (sufficiently because of the lessons, but not necessarily).
In this we know, we have arrived at an understanding of God, if the relation He gives to us with His teaching (of lessons) agrees with our knowledge of Him, in that relationship.