The essence of mathematics lies in its freedom.
All things in their being are good for something.
短期利润绝不能凌驾于地球的长期健康之上。
成功不是终点,失败也不是致命的:重要的是继续前进的勇气。
Legal obligations are not merely moral obligations backed by sanctions.
El miedo es la única enfermedad incurable.