Make up your mind to act decidedly and take the consequences. No good is ever done in this world by hesitation.  

"The past is a foreign country; they do things differently there."

The true genius shudders at incompleteness - and usually prefers silence to saying something which is not everything it could be.

The real tragedy of the poor is that they can afford nothing but self-denial.

The future of computing lies in understanding and harnessing the power of algorithms.

"Die Kunst des Schreibens besteht darin, die Welt so zu beschreiben, wie sie ist, und gleichzeitig so, wie sie sein könnte."