时间旅行是世界上最令人沮丧的事情。你无法改变任何事情，也无法阻止任何事情的发生。

"I don't want to be a product of my environment. I want my environment to be a product of me."

The past is always present, and the present is always past.

化用李商隐诗句，表达乐观豁达的人生态度。