"The human foot is a masterpiece of engineering and a work of art."

"That which can be lost cannot be deemed riches. Virtue is our true wealth and the true reward of its possessor; it cannot be lost, it never deserts us until life leaves us. Hold property and external riches with fear; they often leave their possessor scorned and mocked at for having lost them."

"He who wishes to be rich in a day will be hanged in a year."

"Learning never exhausts the mind."

"Why does the eye see a thing more clearly in dreams than the imagination when awake?"

"I have from an early age abjured the use of meat, and the time will come when men such as I will look upon the murder of animals as they now look upon the murder of men."

"Common Sense is that which judges the things given to it by other senses."

"If the painter has clumsy hands, he will be apt to introduce them into his works, and so of any other part of his person, which may not happen to be so beautiful as it ought to be. He must, therefore, guard particularly against that self-love, or too good opinion of his own person, and study by every means to acquire the knowledge of what is most beautiful, and of his own defects, that he may adopt the one and avoid the other."

"Reprove your friend in secret and praise him in public."

"Iron rusts from disuse; water loses its purity from stagnation... even so does inaction sap the vigor of the mind."

"Life well spent is long."

"The painter has the Universe in his mind and hands."

"Quando ouvimos os sinos, ouvimos aquilo que já trazemos em nós mesmos como modelo. Sou da opinião que não se deverá desprezar aquele que olhar atentamente para as manchas da parede, para os carvões sobre a grelha, para as nuvens, ou para a correnteza da água, descobrindo, assim, coisas maravilhosas. O gênio do pintor há-de se apossar de todas essas coisas para criar composições diversas: luta de homens e de animais, paisagens, monstros, demônios e outras coisas fantásticas. Tudo, enfim, servirá para engrandecer o artista."

"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."

"What is fair in men, passes away, but not so in art."

"Knowledge of the past and of the places of the earth is the ornament and food of the mind of man."

"Our life is made by the death of others."

"They will say that I, having no literary skill, cannot properly express that which I desire to treat of, but they do not know that my subjects are to be dealt with by experience rather than by words. And [experience] has been the mistress of those who wrote well. And so, as mistress, I will cite her in all cases. Though I may not, like them, be able to quote other authors, I shall rely on that which is much greater and more worthy: on experience, the mistress of their masters."

"He turns not back who is bound to a star."

"There is nothing which deceives us as much as our own judgement."

"All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge."

"Life is pretty simple: You do some stuff. Most fails. Some works. You do more of what works. If it works big, others quickly copy it. Then you do something else. The trick is the doing something else."

"Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return."

"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."

"As iron rusts when not used, and water gets foul from standing or turns to ice when exposed to cold, so the intellect degenerates without exercise."

"Although nature commences with reason and ends in experience it is necessary for us to do the opposite, that is to commence with experience and from this to proceed to investigate the reason."

"I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils."

"He who is fixed to a star does not change his mind."

"Time abides long enough for those who make use of it."

"Make your work to be in keeping with your purpose."

"Obstacles cannot crush me every obstacle yields to stern resolve."

"Nothing strengthens authority so much as silence."

"Painting is concerned with all the 10 attributes of sight; which are: Darkness and Light, Solidity and Color, Form and Position, Distance and Propinquity, Motion and Rest."

"As every divided kingdom falls, so every mind divided between many studies confounds and saps itself."

"Wisdom is the daughter of experience."

"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."

"Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what it absorbs."

"It's easier to resist at the beginning than at the end."

"Men of lofty genius when they are doing the least work are most active."

"Fix your course to a star and you can navigate through any storm."

"Oh Lord thou givest us everything at the price of an effort."

"The painter will produce pictures of little merit if he takes the works of others as his standard."

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

"You do ill if you praise, but worse if you censure, what you do not understand."

"Art is never finished, only abandoned."

"For, verily, great love springs from great knowledge of the beloved object, and if you little know it, you will be able to love it only little or not at all."

"The eye which turns from a white object in the light of the sun and goes into a less fully lighted place will see everything as dark."

"Study without desire spoils the memory, and it retains nothing that it takes in."

"Science is the captain, and practice the soldiers."

"Truth at last cannot be hidden. Dissimulation is of no avail. Dissimulation is to no purpose before so great a judge. Falsehood puts on a mask. Nothing is hidden under the sun."