"It is necessary to be given the prop that all elementary props are…

One often makes a remark and only later sees how true it is.

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem, even if this view is still not a clear one.

It seems to me as good as certain that we cannot get the upper hand against England. The English — the best race in the world — cannot lose! We, however, can lose and shall lose, if not this year then next year. The thought that our race …

I work quite diligently and wish that I were better and smarter. And these both are one and the same.

Logic takes care of itself; all we have to do is to look and see how it does it.

My difficulty is only an — enormous — difficulty of expression.