The world is in a constant state of flux. Nothing remains the same from one moment to the next. You can never step into the same river twice.
有时我们为某些事感到悲伤，却不愿告诉别人。我们想保守这个秘密。或者有时我们感到悲伤，却真的不知道为什么悲伤，于是我们说我们不悲伤，但实际上我们是悲伤的。
Every person has a map in their heart, and the map is drawn by their experiences.
Einstein was wrong when he said, 'God does not play dice'. Consideration of black holes suggests, not only that God does play dice, but that he sometimes confuses us by throwing them where they can't be seen
