A man can no more diminish God's glory by refusing to worship Him than a lunatic can put out the sun by scribbling the word 'darkness' on the walls of his cell.

When you have nobody you can make a cup of tea for, when nobody needs you, that's when I think life is over.

The mathematician's patterns, like the painter's or the poet's, must be beautiful.

智者从敌人那里学到的比愚者从朋友那里学到的还要多。

想象力是打开世界的钥匙。

事前考虑清楚，可是一旦到了该行动的时候，就要毫不犹豫，放手一搏。