Intellectual passion dries out sensuality.
Small rooms or dwellings discipline the mind, large ones weaken it.
If on your own or by the criticism of others you discover error in your work, correct it then and there; otherwise in exposing your work to the public, you will expose your error also.
That which can be lost cannot be deemed riches.
It vexes me greatly that having to earn my living has forced me to interrupt the work and to attend to small matters.
Study the science of art and the art of science.
When taking a selfie, remember the most natural pose is still best
I have always felt it is my destiny to build a machine that would allow man to fly.
Where there is most feeling, there is the greatest martyrdom.
Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.
Therefore, O students, study mathematics and do not build without foundations.
Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!
To lie is vile, to tell truth is excellent, if not noble.
Among the great things which are found among us the existence of Nothing is the greatest.
The Book of the science of Mechanics must precede the Book of useful inventions.
We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.
One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.
Good writing comes from good talent.
Experience does not err. Only your judgments err by expecting from her what is not in her power.
Not to anticipate is already to moan.
When Fortune comes, seize her in front with a sure hand, because behind she is bald.
A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.
The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.
The worst evil which can befall the artist is that his work should appear good in his own eyes.
The knowledge of all things is possible
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