Leonardo da Vinci

"A man of genius makes no mistakes. His errors are volitional and are the portals of discovery."

"Freedom is the greatest of all goods."

"Without mathematics, you cannot do anything in this world."

"To love and be loved is to feel the sun from both sides."

"The purpose of mathematics is purely to understand music and astronomy, which are the basis of all life."

"The flower fades, the fruit remains; the fruit decays, the seed remains."

"Water is the driving force of all nature."

"The laws of nature are the canvas God laid down on which he paints his masterpieces."

"Everything comes to us that belongs to us if we create the capacity to receive it."

"You can have anything you want if you sacrifice everything for it."

"In mathematics, there is no ignorance."

"The facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them."

"To be everywhere at once is to be nowhere forever."

"Those who become enamored of practice without science are like pilots who steer without rudder or compass."

"Being everything to everyone is the same as being nothing to anyone."

"The minute you think of giving up is the minute you should press on."

"It is the supreme art of the teacher to awaken joy in creative expression and knowledge."

"Study the science of art and the art of science."

"As a single footstep will not make a path on the earth, so a single thought will not make a pathway in the mind."

"Nature never wears the same expression twice, for her moods are as varied as the tides."

"The true sign of intelligence is not knowledge but imagination."

"Iron rust from disuse; water loses its purity from stagnation."

"Truth has no fear of questions."

"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward."

"An arch consists of two weaknesses which together make a strength."

"There once was a time when all people believed in God and the church ruled. This time is long gone."

"Movement is the one eternal undeniable fact."

"All our knowledge has its origins in our perceptions."

"The desire to know is natural to good men."

"Darkness is to space what silence is to sound."