I am exclusively occupied with the problem of gravitation and hope with the help of a local mathematician friend [Marcel Grossman] to overcome all the difficulties. One thing is certain, however, that never in life have I been quite so tormented. A great respect for mathematics has been instilled within me, the subtler aspects of which, in my stupidity, I regarded until now as pure luxury.

If you want your children to be intelligent, read them fairy tales. If you want them to be more intelligent, read them more fairy tales.

The normal objective of my thought affords no insight into the dark places of human will and feeling.

It is the theory that decides what can be observed.

We must learn to see the world anew.

A permanent peace cannot be prepared by threats but only by the honest attempt to create a mutual trust. However strong national armaments may be, they do not create military security for any nation nor do they guarantee the maintenance of peace.

Everyone must become their own person, however frightful that may be.