The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

Society can and does execute its own mandates， and if it issues wrong mandates instead of right， or any mandates at all in things with which it ought not to meddle， it practices a social tyranny more formidable than many kinds of political oppression， since， though not usually upheld by such extreme penalties， it leaves fewer means of escape， penetrating much more deeply into the details of life， and enslaving the soul itself.

The world is like a chessboard， whereon we may see a living knight， but we cannot see a living chess.

对于如何掌握出色的压水花技能，全红婵曾无意中表示

Randomized evaluations can help us understand what works and what doesn't in development.

The companies that survive will be those that adapt fastest to the new energy reality.