The difference between ordinary and extraordinary is that little extra.

The past is a shadow that follows us everywhere.

Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.

人类心智能够理解宇宙，因为宇宙已经产生了能够理解它的心智。

良好设计的关键是使事情简单，但不过于简单。