Every mental state exists for a purpose; to understand it, we must ask what function it serves in the broader system of behavior.
The beauty of mathematics lies in its ability to describe the universe in the most elegant and concise way.
The more you give, the more you receive.
Life is short, and it's up to you to make it sweet.
旅行就是用双脚写作。
Some of life, you have to go to the great challenges.