"Science is the captain, and practice the..." - Quote by Leonardo Da Vinci

“I have offended God and mankind because my work didn't reach the quality it should have.”

“The beginnings and ends of shadow lie between the light and darkness and may be infinitely diminished and infinitely increased. Shadow is the means by which bodies display their form. The forms of bodies could not be understood in detail but for shadow.”

“People of higher talent work, even if they seem to do nothing”

“We are all born without knowledge, but curious. With curiosity we should be able to learn as much as possible. With curiosity, it has to take a lot of work to remain ignorant.”

“Knowing is not enough! You must take action.”

“Knowledge by suffering entereth,And life is perfected by death.”

“I used to ask my brother Rudy to throw rocks at me. I'd dodge every one. That's how I learned how to bob and weave: ducking rocks.”

“If you want to know the theory and methods of revolution, you must take part in revolution.”

“Practice is just as valuable as a sale. The sale will make you a living; the skill will make you a fortune.”