To enter into your own mind you need to be armed to the teeth.
The folly of mistaking a paradox for a discovery, a metaphor for a proof, a torrent of verbiage for a spring of capital truths, and oneself for an oracle, is inborn in us.
History is the science of things which are not repeated.
To see is to forget the name of the thing one sees.
Whoever wants to accomplish great things must devote to a lot of profound thought to details.
My hand feels touched as well as it touches; reality says this, and nothing more.