Learning is the only thing that never disappoints us.

Music... is the shaping of the invisible.

I have discovered that a screw-shaped device such as this, if it is well made from starched linen, will rise in the air if turned quickly.

Nothing is hidden under the sun.

The water which rises in the mountains is the blood which keeps the mountain in life.

Those who are in love with practice without knowledge are like the sailor who gets into a ship without rudder or compass and who never can be certain whether he is going. Practice must always be founded on sound theory, and to this Perspective is the guide and the gateway; and without this nothing can be done well in the matter of drawing.

Realize that everything connects to everything else.