The sun gives spirit and life to the plants and the earth nourishes them with moisture.
It is a far worthier thing to read by the light of experience than to adorn oneself with the labors of others.
He who in reasoning cites authority is making use of his memory rather than of his intellect.
Art lives from constraints and dies from freedom.
Who sows virtue ought to reap honour.
I wish to work miracles.
For those colours which you wish to be beautiful, always first prepare a pure white ground.
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.
Whatever you think matters - doesn't. Follow this rule, and you will add decades to your life. Rodger Rosenblatt As a well spent day brings happy sleep, so life well used brings happy death.
The Book of the science of Mechanics must precede the Book of useful inventions.
Just as eating against one's will is injurious to health, so studying without a liking for it spoils the memory, and it retains nothing it takes in.
Strive to preserve your health; and in this you will better succeed in proportion as you keep clear of the physicians, for their drugs are a kind of alchemy concerning which there are no fewer books than there are medicines.
He who has access to the fountain does not go to the water-pot.
No human investigation can be called real science if it cannot be demonstrated mathematically.
True and great love springs out of great knowledge, and where you know little you can love but little or not at all.
Experience does not err. Only your judgments err by expecting from her what is not in her power.
Lust is the cause of generation.
There is nothing that deceives us more than our own judgment when used to give an opinion on our own works. It is sound in judging the work of our enemies but not that of our friends, for hate and love are two of the most powerfully motivating factors found among living things.
A good painter has two main objects to paint, man and the intention of his soul.
I am never weary of being useful... In serving others I cannot do enough. No labor is sufficient to tire me.
I have offended God and mankind because my work didn't reach the quality it should have.
Every man at three years old is half his height
Those who are inspired by a model other than Nature, labor in vain.
While you are alone you are entirely your own master and if you have one companion you are but half your own, and the less so in proportion to the indiscretion of his behavior.
But to me all sciences seem vain and full of error that are not born of experience, mother of all certainty, and do not terminate in an actual experience.
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