Sanity is madness put to good use.

Prayer is not a substitute for work; it is an effort to work further and be efficient beyond the range of one's powers.

To feel beauty is a better thing than to understand how we come to feel it. To have imagination and taste, to love the best, to be carried by the contemplation of nature to a vivid faith in the ideal, all this is more, a great deal more, than any science can hope to be.

Everything in nature is lyrical in its ideal essence, tragic in its fate, and comic in its existence.

Art is a delayed echo.

To knock a thing down, especially if it is cocked at an arrogant angle, is a deep delight of the blood.

Progress, far from consisting in change, depends on retentiveness. Those who cannot remember the past are condemned to repeat it.