I turn aside with a shudder of horror from this lamentable plague of functions which have no derivatives.

There exists, if I am not mistaken, an entire world which is the totality of mathematical truths, to which we have access only with our mind, just as a world of physical reality exists, the one like the other independent of ourselves, both of divine creation.

We are servants rather than masters in mathematics.

Abel has left mathematicians enough to keep them busy for 500 years.

Every morning I take out my bankbook, stare at it, shudder-and turn quickly to my typewriter.

But if they turn aside, We have not sent you as a watcher over them; on you is only to deliver (the message); and surely when We make man taste mercy from Us, he rejoices thereat; and if an evil afflicts them on account of what their hands have already done, then-surely man is ungrateful.