“He who does not punish evil, commands it to be done.”

“The merit of painting lies in the exactness of reproduction. Painting is a science and all sciences are based on mathematics.”

“In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time.”

“Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.”

“It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.”

“Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works.”

“All knowledge which ends in words will die as quickly as it came to life, with the exception of the written word: which is its mechanical part.”

“Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.”

“One can have no smaller or greater mastery than mastery of oneself.”

“No human investigation can be called real science if it cannot be demonstrated mathematically.”

“Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.”

“Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.”

"The eye sees a thing more clearly in dreams than the imagination awake."

“One can have no smaller or greater mastery than mastery of oneself.”

“Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works.”

“Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.”

“Love shows itself more in adversity than in prosperity; as light does, which shines most where the place is darkest.”

"Poor is the pupil who does not surpass his master."