We perceive the world in terms of its utility for our survival.

The only way to learn mathematics is to do mathematics.

I prefer to supervise the whole operations of the government myself rather than entrust the public business to subordinates, and this makes my duties very great.

"A nation that destroys its soils destroys itself. Forests are the lungs of our land, purifying the air and giving fresh strength to our people."

夜未央，我亦未央。

"Every moment is a memory in the making, and every memory is a moment lost."