The cause of suffering is not thinking, it's identification with thinking. This is very, very important to understand, because if you don't understand that it's identification with thinking that's really at the heart of the matter, and you assume that it's thinking itself that's the problem, then you can waste immense amounts of time and energy trying to stop your mind from thinking, trying to better your mind.

The Basic Teachings - Part 1: Principles of the Teaching (2009)