Impressive people report how much insight they have found in the works of neurologist Oliver Sacks, as in this article on BrainPickings.org:

Sontag’s experience, Sacks argues, reflects the common pattern in the natural cycle of creative evolution — we learn our own minds by finding out what we love; these models integrate into a sensibility; out of that sensibility arises the initial impulse for imitation, which, aided by the gradual acquisition of technical mastery, eventually ripens into original creation.