He who has access to the fountain does not go to the water-pot.

Old age takes in part savoury wisdom for its food - see to that your old age will not lack in nourishment.

The color of the object illuminated partakes of the color of that which illuminates it.

It's not enough that you believe what you see. You must also understand what you see.

Every now and then go away, have a little relaxation, for when you come back to your work your judgment will be surer. Go some distance away because then the work appears smaller and more of it can be taken in at a glance and a lack of harmony and proportion is more readily seen.

Nothing strengthens authority so much as silence.

We might say that the earth has the spirit of growth; that its flesh is the soil.