The difference between a dream and a goal is action.

Chemistry is the science of connections, both literal and metaphorical.

数学的美在于它的普遍性。

心理学的目的是理解生活如何运作。

Act as if what you do makes a difference. It does.

剑鞘保护剑的锋利，自己却满足於它自己的迟钝。

The only way to achieve true freedom is through education and enlightenment.