True and great love springs out of great knowledge, and where you know little you can love but little or not at all.
I shall do down in history as the man who opened a door!
Nature alone is the master of true genius.
Threats alone, are the weapons of the threatened man.
We ought not to desire the impossible.
The good painter must paint two things: a person and the essence of his soul.
The grave will fall in upon him who digs it.
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.
Therefore, O students, study mathematics and do not build without foundations.
Let no man who is not a Mathematician read the elements of my work.
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.
You can have no dominion greater or less than that over yourself.
The painter's mind is a copy of the divine mind, since it operates freely in creating the many kinds of animals, plants, fruits, landscapes, countrysides, ruins, and awe-inspiring places.
Fear arises sooner than anything else.
The Book of the science of Mechanics must precede the Book of useful inventions.
The spirit desires to remain with its body, because, without the organic instruments of that body, it can neither act, nor feel anything.
I have been impressed with the urgency of doing.
The desire to know is natural to good men.
I am never weary of being useful... In serving others I cannot do enough. No labor is sufficient to tire me.
Men of genius sometimes accomplish most when they work least, for they are thinking out inventions.
Life, when is spent well, is long.
Nature is full of infinite causes that have never occurred in experience.
You will never have a greater or lesser dominion than that over yourself.
A deaf and dumb person who sees two men in conversation - may nevertheless understand from the attitudes and gestures of the speakers, how well their discussion is getting along.
Here is a thing which the more it is needed the more it is rejected: and this is advice, which is unwillingly heeded by those who most need it, that is to say, by the ignorant.
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