Long hair minimizes the need for barbers; socks can be done without; one leather jacket solves the coat problem for many years; suspenders are superfluous.

One must take what nature gives as one finds it.

I am not a positivist. Positivism states that what cannot be observed does not exist. This conception is scientifically indefensible, for it is impossible to make valid affirmations of what people 'can' or 'cannot' observe. One would have to say 'only what we observe exists,' which is obviously false.

There are yet people who say there is no God. But what really makes me angry is that they quote me for the support of such views

A scientist is a mimosa when he himself has made a mistake, and a roaring lion when he discovers a mistake of others.

I don't need to know everything, I just need to know where to find it, when I need it

I must try, however, as best I can, although I am very conscious of the fact that our feelings and strivings are often contradictory and obscure and that they cannot be expressed in easy and simple formulas.