Depth begins where most people become bored.

Boredom is a fairly reliable marker of where the crowd stops. It arrives at the moment novelty runs out, which is also the moment real understanding begins to accumulate. So the territory past boredom stays uncrowded, not because it is hard to reach, but because almost nobody tolerates the stretch of dullness that guards the entrance.

When you feel bored with something you chose deliberately, treat that feeling as information about your appetite rather than about the thing. Sit with it for one more session before you decide. Depth tends to be waiting a short distance beyond where you wanted to quit.