"You can have no dominion greater or less than that over yourself."

"Intellectual passion drives out sensuality."

"I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do."

"The noblest pleasure is the joy of understanding."

"A beautiful body perishes, but a work of art dies not."

"Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death."

"The function of muscle is to pull and not to push, except in the case of the genitals and the tongue."

"Beyond a doubt truth bears the same relation to falsehood as light to darkness."

"Marriage is like putting your hand into a bag of snakes in the hope of pulling out an eel."

"Simplicity is the ultimate sophistication."

"If the painter wishes to see beauties that charm him, it lies in his power to create them, and if he wishes to see monstrosities that are frightful, ridiculous, or truly pitiable, he is lord and God thereof."

"Fine gold is recognized when it is tested."

"Nature never breaks her own laws."

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

"Nothing should be so greatly feared as empty fame."

"As a well-spent day brings happy sleep, so a life well spent brings happy death."

"Who sows virtue reaps honor."

"Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!"

"Realize that everything connects to everything else."

"No counsel is more sincere than that given on ships which are in danger."

"A well-spent day brings happy sleep."

"To such an extent does nature delight and abound in variety that among her trees there is not one plant to be found which is exactly like another; and not only among the plants, but among the boughs, the leaves and the fruits, you will not find one which is exactly similar to another."

"Time stays long enough for anyone who will use it."

"Just as courage imperils life, fear protects it."

"He who does not value life does not deserve it."

"While I thought that I was learning how to live, I have been learning how to die."

"Man and animals are in reality vehicles and conduits of food, tombs of animals, hostels of Death, coverings that consume, deriving life by the death of others."

"Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous."

"You will never have a greater or lesser dominion than that over yourself...the height of a man's success is gauged by his self-mastery, the depth of his failure by his self-abandonment. ...And this law is the expression of eternal justice. He who cannot establish dominion over himself will have no dominion over others."

"Experience does not err. Only your judgments err by expecting from her what is not in her power."

"God sells us all things at the price of labor."

"Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory."

"The common sense is that which judges the things given to it by other senses."

"He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast."

"Painting is mute poetry, and poetry is blind painting."

"Tears come from the heart and not from the brain."

"Obstacles cannot crush me. Every obstacle yields to stern resolve. He who is fixed to a star does not change his mind."

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

"In order to arrive at knowledge of the motions of birds in the air, it is first necessary to acquire knowledge of the winds, which we will prove by the motions of water in itself, and this knowledge will be a step enabling us to arrive at the knowledge of beings that fly between the air and the wind."

"Where there is shouting, there is no true knowledge."

"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."

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

"If you are alone you belong entirely to yourself. If you are accompanied by even one companion you belong only half to yourself or even less in proportion to the thoughtlessness of his conduct and if you have more than one companion you will fall more deeply into the same plight."

"He who thinks little errs much."

"There are three classes of people: those who see, those who see when they are shown, those who do not see."

"To become an artist you have to be curious."

"The truth of things is the chief nutriment of superior intellects."

"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."

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

"The acquisition of knowledge is always of use to the intellect, because it may thus drive out useless things and retain the good. For nothing can be loved or hated unless it is first known."