We are what we think. All that we are arises with our thoughts. With our thoughts, we make the world.

I very rarely think in words at all. A thought comes, and I may try to express it in words afterwards.

Why does man not see things? He is himself standing in the way: he conceals things.

Our writing equipment takes part in forming our thoughts.

A thinker sees his own actions as experiments and questions-as attempts to find out something. Success and failure are for him answers above all.

Those who cannot understand how to put their thoughts on ice should not enter into the heat of debate.