Good sense is the most evenly distributed thing in the world.

Once in one's life, everything should be called into doubt.

Divide each difficulty into as many parts as possible for a better solution.

I think, therefore I am.

For Being is, and non-Being is not.

-- Parmenides

For thinking and Being are the same.

-- Parmenides

All things flow.

-- Heraclitus

Fables should be taught as fables, myths as myths, and miracles as poetic fancies.

-- Hypatia

For whom emptiness works, everything works. For whom emptiness does not work, nothing works.

-- Nagarjuna

The course of Heaven is constant: it does not prevail because of Yao, nor does it cease because of Jie.

-- Xunzi