Thoughts of themselves have no substance; let them arise and pass away unheeded. Thoughts will not take form of themselves, unless they are grasped by the attention; if they are ignored, there will be no appearing and no disappearing. – Ashvaghosha

Thinking more than others about our own thoughts is not self-centeredness. It means that if asked whats on our mind, we are less likely to mention being aware of the world around us, and more likely to mention our inner reflections. But we are less likely to mention thinking about other people. – Elaine N. Aron

It is the power of thought that gives man power over nature. – Hans Christian Andersen

Thought is a kind of opium; it can intoxicate us, while still broad awake; it can make transparent the mountains and everything that exists. – Henri Frederic Amiel