The boundaries of bodies are the least of all things.
The water which rises in the mountains is the blood which keeps the mountain in life.
Many will think they may reasonably blame me by alleging that my proofs are opposed to the authority of certain men held in the highest reverence by their inexperienced judgments; not considering that my works are the issue of pure and simple experience.
The spirit desires to remain with its body, because, without the organic instruments of that body, it can neither act, nor feel anything.
When you are painting you should take a flat mirror and often look at your work within it, and it will then be seen in reverse, and will appear to be by the hand of some other master, and you will be better able to judge of its faults than in any other way.
I have solved what color is, however ; I still have no idea about what line is.
Make your faces so that they do not all have the same expression, as one sees with most painters, but give them different expression, according to age, complexion, and good or bad character.
Good culture is born of a good disposition; and since the cause is more to be praised than the effect, I will rather praise a good disposition without culture, than good culture without the disposition.
Experience never errs; it is only your judgments that err by promising themselves effects such as are not caused by your experiments.
Science is the captain, and practice the soldiers.
Men and words are ready made, and you, O Painter, if you do not know how to make your figures move, are like an orator who knows not how to use his words.
Of several bodies, all equally large and equally distant, that which is most brightly illuminated will appear to the eye nearest and largest.
I roamed the countryside searching for answers to things I did not understand. Why shells existed on the tops of mountains. How the various circles of water form around the spot which has been struck by a stone, and why a bird sustains itself in the air.
One can have no more mastery over the environment, than one has over himself.
The evil which does me no harm is like the good which in no wise avails me.
An infinite number of men will sell publicly and unhindered things of the very highest price, without leave from the Master of it; while it never was theirs nor in their power; and human justice will not prevent it.
The bones of the Dead will be seen to govern the fortunes of him who moves them.
The men of experiment are like the ant; they only collect and use. But the bee...gathers its materials from the flowers of the garden and of the field, but transforms and digests it by a power of its own.
To speak ill of a good person is not truly good, all in all.
Each man is always in the middle of the surface of the earth and under the zenith of his own hemisphere, and over the centre of the earth.
The knowledge of the past times and of the places of the earth is both an ornament and nutriment to the human mind.
Thirst will parch your tongue and your body will waste through lack of sleep ere you can describe in words that which painting instantly sets before the eye.
To make a perfume, take some rose water and wash your hands in it, then take a lavender flower and rub it with your palms, and you will achieve the desired effect
Abbreviators do harm to knowledge and to love.
Some promises and time disappoint us
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