Yes, we now have to divide up our time like that, between politics and our equations. But to me our equations are far more important, for politics are only a matter of present concern. A mathematical equation stands forever.

It is only men who are free, who create the inventions and intellectual works which to us moderns make life worth while.

If God has created the world, his primary worry was certainly not to make its understanding easy for us

I am neither especially clever nor especially gifted. I am only very, very curious.

In the midst of every crisis, lies great opportunity.

Scientists investigate that which already is; Engineers create that which has never been.

The strength of the Constitution lies entirely in the determination of each citizen to defend it. Only if every single citizen feels duty bound to do his share in this defense are the constitutional rights secure.