It would be a lowly art that allowed itself to be understood all at once.

All is born of water; all is sustained by water.

Three things are to be looked to in a building: that it stand on the right spot; that it is securely founded; that it be successfully executed.

The art of living rightly is like all arts; it must be learned and practiced with incessant care.

The greatest thing in this world is not so much where we stand as in what direction we are moving.

The most difficult thing is what is thought to be the simplest; to really see the things which are before your eyes.

It is so hard that one cannot really have confidence in doctors and yet cannot do without them.