The wheel and the brake have different duties, but also one in common: to hurt one another.

It is perhaps just dawning on five or six minds that physics, too, is only an interpretation and exegesis of the world (to suit us, if I may say so!) and not a world-explanation.

We operate with nothing but things which do not exist, with lines, planes, bodies, atoms, divisible time, divisible space - how should explanation even be possible when we first make everything into an image, into our own image!

We are franker towards others than towards ourselves.

One has to take a somewhat bold and dangerous line with this existence: especially as, whatever happens, we are bound to lose it.

as though "the Truth" were such an innocent and incompetent creature as to require protectors!

Whoever feels predestined to see and not to believe will find all believers too noisy and pushy: he guards against them.