我不担心人们说什么。我知道我能做什么。

The revolution is made through human beings, but individuals must forge their revolutionary spirit day by day.

The true value of a forest can never be measured in board feet alone.

The most powerful thing you can be is yourself.

We can distinguish the blurred shapes and colours we see at a distance only because of the capacities of our eyes.

进步的艺术是在变化中保持秩序，在秩序中保持变化。