He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.
What is is what must be.
Nothing is more important than to see the sources of invention which are, in my opinion more interesting than the inventions themselves.
Nothing is necessitated whose opposite is possible.
We live in the best of all possible worlds
Nature does not make leaps.
Make me the the master of education, and I will undertake to change the world.
The pleasure we obtain from music comes from counting, but counting unconsciously. Music is nothing but unconscious arithmetic.
I am convinced that the unwritten knowledge scattered among men of different callings surpasses in quantity and in importance anything we find in books, and that the greater part of our wealth has yet to be recorded.
If we were magically shrunk and put into someone's brain while she was thinking, we would see all the pumps, pistons, gears and levers working away and we would be able to describe the workings completely, in mechanical terms, thereby completely describing the thought processes of the brain. But that description would not contain any mention of thought! It would contain nothing but descriptions of pumps, pistons, levers!
The most perfect society is that whose purpose is the universal and supreme happiness.
It is God who is the ultimate reason things, and the Knowledge of God is no less the beginning of science than his essence and will are the beginning of things.
It is necessary to believe that the mixture of evil has produced the greatest possible good: otherwise the evil would not have been permitted.
There is nothing waste, nothing sterile, nothing dead in the universe; no chaos, no confusions, save in appearance.
Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.
There are also two kinds of truths, those of reasoning and those of fact. Truths of reasoning are necessary and their opposite is impossible, and those of fact are contingent and their opposite is possible. When a truth is necessary its reason can be found by analysis, resolving it into more simple ideas and truths until we reach those which are primitive.
The present is big with the future, the future might be read in the past, the distant is expressed in the near.
All things in God are spontaneous.
To love is to take delight in happiness of another, or, what amounts to the same thing, it is to account another's happiness as one's own.
It is unworthy of excellent men to lose hours like slaves in the labor of calculation which could be relegated to anyone else if machines were used.
It is worth noting that the notation facilitates discovery. This, in a most wonderful way, reduces the mind's labour.
Thus God alone is the primary Unity, or original simple substance, from which all monads, created and derived, are produced.
Every present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.
Imaginary numbers are a fine and wonderful refuge of the divine spirit almost an amphibian between being and non-being.
I agree with you that it is important to examine our presuppositions, throughly and once for all, in order to establish something solid. For I hold that it is only when we can prove all that we bring forward that we perfectly understand the thing under consideration. I know that the common herd takes little pleasure in these researches, but I know also that the common herd take little pains thoroughly to understand things.
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