Success comes from curiosity, concentration, perseverance and self criticism.

I wouldn't want to live if I did not have my work. In any case, it's good that I'm already old and personally don't have to count on a prolonged future.

You believe in a God who plays dice, I in complete law and order.

A hundred times every day I remind myself that my inner and outer life are based on the labors of others.

In the middle of every difficulty lies opportunity.

Human beings, vegetables, or cosmic dust, we all dance to a mysterious tune, intoned in the distance by an invisible piper.

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