The only way to learn mathematics is to do mathematics.
爱是统一和凝聚的原则，争斗是分离和崩解的力量。
The mystery of the room is in the play of light.
I think you should be able to do whatever you want as long as you're not hurting anybody.
If time travel is possible, where are the tourists from the future?
El deber del escritor es decir lo indecible, dar voz a los sin voz.