Size is not grandeur, and territory does not make a nation.

Whatever part of the animal fabric whatever series of muscles, whatever viscera might be selected for comparison the result would be the same the lower Apes and the Gorilla would differ more than the Gorilla and the Man.

All truth, in the long run, is only common sense clarified.

And when you cannot prove that people are wrong, but only that they are absurd, the best course is to let them alone.

I took thought, and invented what I conceived to be the appropriate title of 'agnostic'.

It is not to be forgotten that what we call rational grounds for our beliefs are often extremely irrational attempts to justify our instincts.

Mathematics may be compared to a mill of exquisite workmanship, which grinds your stuff to any degree of fineness.