Giorgio Vasari

“These rough sketches, which are born in an instant in the heat of inspiration, express the idea of their author in a few strokes, while on the other hand too much effort and diligence sometimes saps the vitality and powers of those who never know when to leave off.”
― Giorgio Vasari

“...no one ever became excellent in any exercise whatsoever without beginning from his childhood to endure heat, cold, hunger, thirst, and other discomforts; wherefore those men are entirely deceived who think to be able, at their ease and with all the comforts of the world, to attain an honorable rank. It is not by sleeping but by waking and studying continually that progress is made. [on Luca Della Robbia]”
― Giorgio Vasari