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Our reasonings are grounded upon two great principles, that of contradiction, in virtue of which we judge false that which involves a contradiction, and true that which is opposed or contradictory to the false.

Gottfried Leibniz

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Gottfried Leibniz
Age: 70 †
Born: 1646
Born: July 1
Died: 1716
Died: November 14
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Take what you need, do what you should, you will get what you want.
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God's relation to spirits is not like that of a craftsman to his work, but also like that of a prince to his subjects.
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Philosophy consists mostly of kicking up a lot of dust and then complaining that you can't see anything.
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For things remain possible, even if God does not choose them. Indeed, even if God does not will something to exist, it is possible for it to exist, since, by its nature, it could exist if God were to will it to exist.
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Nothing is accomplished all at once, and it is one of my great maxims, and one of the most completely verified, that Nature makes no leaps: a maxim which I have called the law of continuity.
Gottfried Leibniz
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In symbols one observes an advantage in discovery which is greatest when they express the exact nature of a thing briefly and, as it were, picture it then indeed the labor of thought is wonderfully diminished.
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The present is saturated with the past and pregnant with the future.
Gottfried Leibniz
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There never is absolute birth nor complete death, in the strict sense, consisting in the separation of the soul from the body. What we call births are developments and growths, while what we call deaths are envelopments and diminutions.
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It's easier to be original and foolish than original and wise.
Gottfried Leibniz
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Reality cannot be found except in One single source, because of the interconnection of all things with one another. I maintain also that substances, whether material or immaterial, cannot be conceived in their bare essence without any activity, activity being of the essence of substance in general.
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The words 'Here you can find perfect peace' can be written only over the gates of a cemetery.
Gottfried Leibniz
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Natural religion itself, seems to decay very much. Many will have human souls to be material: others make God himself a corporeal being.
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He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.
Gottfried Leibniz
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The dot was introduced as a symbol for multiplication by Leibniz. On July 29, 1698, he wrote in a letter to Johann Bernoulli: I do not like X as a symbol for multiplication, as it is easily confounded with x.
Gottfried Leibniz
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...a distinction must be made between true and false ideas, and that too much rein must not be given to a man's imagination under pretext of its being a clear and distinct intellection.
Gottfried Leibniz
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Either there are no corporeal substances, and bodies are merely phenomena which are true or consistent with each other, such as a rainbow or a perfectly coherent dream, or there is in all corporeal substances something analogous to the soul.
Gottfried Leibniz
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One cannot explain words without making incursions into the sciences themselves, as is evident from dictionaries and, conversely, one cannot present a science without at the same time defining its terms.
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I also take it as granted that every created thing, and consequently the created monad also, is subject to change, and indeed that this change is continual in each one.
Gottfried Leibniz
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I hold that it is only when we can prove everything we assert that we understand perfectly the thing under consideration.
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Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.
Gottfried Leibniz