An unflinching determination to take the whole evidence into account is the only method of preservation against the fluctuating extremes of fashionable opinion.

The ultimate metaphysical ground is the creative advance into novelty.

Nature is probably quite indifferent to the aesthetic preferences of mathematicians.

Art attracts us only by what it reveals of our most secret self.

Nobody has a right to speak more clearly than he thinks.

The paradox is now fully established that the utmost abstractions are the true weapons with which to control our thought of concrete fact.

Religion is the last refuge of human savagery.