译文：一句话不对就容易把天惹塌，话没有经过多次思考就不要说出口。赏析：在说出每一句话前，我们都要深思熟虑后才能出口，否则就会中伤别人。

最好的艺术是关于变化的——关于思想的运动和感知的转变。

我不害怕说出自己的想法，并为我所信仰的东西站出来。

The self grows through dialogue with others and with the world.

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.