The greatest cruelty is our casual blindness to the despair of others.
The unity of mathematics is not an illusion but a reality waiting to be uncovered.
每个想法都有其目的,即使我们无法立即察觉。
解释:所谓美的东西,无论在上下、内外还是远近,都不会产生危害,所以才叫做美。