The earth is the same in all directions, and men stand upright on it everywhere.
地球在所有方向上都是相同的,人类在任何地方都直立其上。
In mathematics, you don't understand things. You just get used to them.
数学是模式的科学,我们研究它们以学习如何逻辑地、批判地和创造性地思考。