Seek simplicity, and distrust it.

The difference between ancients and moderns is that the ancients asked what have we experienced, and moderns asked what can we experience.

Science repudiates philosophy. In other words, it has never cared to justify its truth or explain its meaning.

There are no whole truths: All truths are half-truths.

An open mind is all very well in its way, but it ought not to be so open that there is no keeping anything in or out of it.

It takes an extraordinary intelligence to contemplate the obvious.

Human life is driven forward by its dim apprehension of notions too general for its existing language.