The Three great mysteries: air to a bird, water to a fish, mankind to himself.

It takes a thorn to remove a thorn.

A man in this world without learning is as a beast of the field.

When an elephant is in trouble even a frog will kick him.

There is nothing noble in being superior to some other man. The true nobility is in being superior to your previous self.

Help thy brother's boat across, and lo! thine own has reached the shore.