It is just as foolish to complain that people are selfish and treacherous as it is to complain that the magnetic field does not increase unless the electric field has a curl. Both are laws of nature.

Computers are like humans - they do everything except think.

Truth is much too complicated to allow anything but approximations.

Life is a process which may be abstracted from other media.

By and large it is uniformly true in mathematics that there is a time lapse between a mathematical discovery and the moment when it is useful; and that this lapse of time can be anything from 30 to 100 years, in some cases even more; and that the whole system seems to function without any direction, without any reference to usefulness, and without any desire to do things which are useful.

I would like to make a confession which may seem immoral: I do not believe absolutely in Hilbert space any more.

Any one who considers arithmetical methods of producing random digits is, of course, in a state of sin.