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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.

Gottfried Leibniz

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Gottfried Leibniz
Age: 70 †
Born: 1646
Born: July 1
Died: 1716
Died: November 14
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Gottfried Wilhelm
Leibniz
Gottfried Wilhelm von Leibniz
Freiherr Gottfried Wilhelm von Leibniz
Gottfried Leibniz
Leibnitz
Everything
Thing
Assert
Consideration
Perfectly
Prove
Hold
Understand

More quotes by Gottfried Leibniz

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To love is to place happiness in the heart of another.
Gottfried Leibniz
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Take what you need, do what you should, you will get what you want.
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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I have seen something of the project of M. de St. Pierre, for maintaining a perpetual peace in Europe. I am reminded of a device in a cemetery, with the words: Pax perpetua for the dead do not fight any longer: but the living are of another humor and the most powerful do not respect tribunals at all.
Gottfried Leibniz
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Although the whole of this life were said to be nothing but a dream and the physical world nothing but a phantasm, I should call this dream or phantasm real enough, if, using reason well, we were never deceived by it.
Gottfried Leibniz
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But it is the knowledge of necessary and eternal truths which distinguishes us from mere animals, and gives us reason and the sciences, raising us to knowledge of ourselves and God. It is this in us which we call the rational soul or mind.
Gottfried Leibniz
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The pleasure we obtain from music comes from counting, but counting unconsciously. Music is nothing but unconscious arithmetic.
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.
Gottfried Leibniz
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The greatness of a life can only be estimated by the multitude of its actions. We should not count the years, it is our actions which constitute our life.
Gottfried Leibniz
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Therefore, I have attacted [the problem of the catenary] which I had hitherto not attempted, and with my key [the differential calculus] happily opened its secret. Acta eruditorum
Gottfried Leibniz
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And there must be simple substances, because there are compounds for the compound is nothing but a collection or aggregatum of simples.
Gottfried Leibniz
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There is no way in which a simple substance could begin in the course of nature, since it cannot be formed by means of compounding.
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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The words 'Here you can find perfect peace' can be written only over the gates of a cemetery.
Gottfried Leibniz
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Make me the the master of education, and I will undertake to change the world.
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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Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.
Gottfried Leibniz
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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.
Gottfried Leibniz
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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.
Gottfried Leibniz
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Indeed every monad must be different from every other. For there are never in nature two beings, which are precisely alike, and in which it is not possible to find some difference which is internal, or based on some intrinsic quality.
Gottfried Leibniz