For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.

I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection. 'Tis the business of little minds to shrink, but they whose heart is firm, and whose conscience approves their conduct, will pursue their principles unto death.

If we make mistakes in our first compositions and do not know them, we may not amend them.

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.

The eye - which sees all objects reversed - retains the images for some time.

That which has no limitations, has no form.

Details make perfection, and perfection is not a detail.