Citações Gottfried Wilhelm Leibniz

„To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love.“

—  Gottfried Leibniz

The Elements of True Piety (c. 1677), The Shorter Leibniz Texts (2006) http://books.google.com/books?id=oFoCY3xJ8nkC&dq edited by Lloyd H. Strickland, p. 189

„Every substance is as a world apart, independent of everything else except God.“

—  Gottfried Leibniz, livro Discourse on Metaphysics

Chaque substance est comme un monde à part, indépendant de toute autre chose, hors de Dieu...
Discours de métaphysique (1686)

„And as every present state of a simple substance is naturally a consequence of its preceding state, so its present is pregnant with its future.“

—  Gottfried Leibniz

Et comme tout présent état d'une substance simple est naturellement une suite de son état précédent, tellement, que le présent y est gros de l'avenir.
La monadologie (22).
The Monadology (1714)

„In whatever manner God created the world, it would always have been regular and in a certain general order. God, however, has chosen the most perfect, that is to say, the one which is at the same time the simplest in hypothesis and the richest in phenomena.“

—  Gottfried Leibniz, livro Discourse on Metaphysics

De quelque manière que Dieu aurait créé le monde, il aurait toujours été régulier et dans un certain ordre général. Mais Dieu a choisi celui qui est le plus parfait, c’est-à-dire celui qui est en même temps le plus simple en hypothèses et le plus riche en phénomènes...
Discours de métaphysique (1686); Leibniz famously tried to show that ours is the best of all possible worlds (see also Monadologie (53 & 54) below and compare Maimonides from Guide for the Perplexed (c. 1190), "Whatever is formed of matter receives the most perfect form possible in that species of matter.") These attempts were mercilessly parodied in Voltaire's Candide. Quotations from Voltaire's novel are often mistakenly attributed to Leibniz. Other statements by Leibniz upon the subject include these:
S'il n'y avait pas le meilleur (optimum) parmi tous les mondes possibles, Dieu n'en aurait produit aucun.
If there were no best among all possible worlds, God would not have created one.
Théodicée (1710)ː I. 8
I do not believe that a world without evil, preferable in order to ours, is possible; otherwise it would have been preferred. It is necessary to believe that the mixture of evil has produced the greatest possible good: otherwise the evil would not have been permitted.
The combination of all the tendencies to the good has produced the best; but as there are goods that are incompatible together, this combination and this result can introduce the destruction of some good, and as a result some evil.
Letter to Bourguet (late 1712)], as translated in The Shorter Leibniz Texts (2006) http://books.google.com/books?id=oFoCY3xJ8nkC&dq edited by Lloyd H. Strickland, p. 208

„There are two kinds of truths: those of reasoning and those of fact. The truths of reasoning are necessary and their opposite is impossible; the truths of fact are contingent and their opposites are possible.“

—  Gottfried Leibniz

Il y a aussi deux sortes de vérités, celles de Raisonnement et celle de Fait. Les vérités de Raisonnement sont nécessaires et leur opposé est impossible, et celles de Fait sont contingentes et leur opposé est possible.
La monadologie (33).
The Monadology (1714)

„Thus it may be said that not only the soul, the mirror of an indestructible universe, is indestructible, but also the animal itself, though its mechanism may often perish in part and take off or put on an organic slough.“

—  Gottfried Leibniz

Ainsi on peut dire que non seulement l'âme, miroir d'un univers indestructible, est indestructible, mais encore l'animal même, quoique sa machine périsse souvent en partie, et quitte ou prenne des dépouilles organiques.
La monadologie (77).
Sometimes paraphrased as: The soul is the mirror of an indestructible universe.
The Monadology (1714)

„There are two famous labyrinths where our reason very often goes astray. One concerns the great question of the free and the necessary, above all in the production and the origin of Evil. The other consists in the discussion of continuity, and of the indivisibles which appear to be the elements thereof, and where the consideration of the infinite must enter in.“

—  Gottfried Leibniz, livro Théodicée

Il y a deux labyrinthes fameux où notre raison s’égare bien souvent : l'un regarde la grande question du libre et du nécessaire, surtout dans la production et dans l'origine du mal ; l'autre consiste dans la discussion de la continuité et des indivisibles qui en paraissent les éléments, et où doit entrer la considération de l'infini.
Théodicée (1710)ː Préface

„De arte characteristica ad perficiendas scientias ratione nitentes in C. I. Gerhardt (ed.), Die philosophischen Schriften von Gottfried Wilhelm Leibniz (7 vols. 1875–1890) VII 125.“

—  Gottfried Leibniz

"[...] if controversies were to arise, there would be no more need of disputation between two philosophers than between two calculators. For it would suffice for them to take their pencils in their hands and to sit down at the abacus, and say to each other (and if they so wish also to a friend called to help): Let us calculate."
The famous calculemus of Leibniz appears in several places of his writing; this is the most frequently quoted; variants are found in the Preface to his New Essays on Human Understanding, and in Dissertatio de Arte Combinatoria (1666). See R. Chrisley, Artificial Intelligence (2000), p. 14 https://books.google.ch/books?id=dLQ3bDy2tgYC&pg=PA14#v=onepage&q&f=false; H. Busche, Leibniz' Weg ins perspektivische Universum (1997), p. 134 https://books.google.ch/books?id=xAI4Wtp0GBoC&pg=PA134&lpg=PA134.
Original: (la) quando orientur controversiae, non magis disputatione opus erit inter duos philosophus, quam inter duos computistas. Sufficiet enim calamos in manus sumere sedereque ad abacos, et sibi mutuo (accito si placet amico) dicere: calculemus

„Only geometry can hand us the thread [which will lead us through] the labyrinth of the continuum’s composition, the maximum and the minimum, the infinitesimal and the infinite; and no one will arrive at a truly solid metaphysic except he who has passed through this [labyrinth].“

—  Gottfried Leibniz

Dissertatio Exoterica De Statu Praesenti et Incrementis Novissimis Deque Usu Geometriae (Spring 1676)
Original: (la) Nam filum labyrintho de compositione continui deque maximo et minimo ac indesignabili at que infinito non nisi geometria praebere potest, ad metaphysicam vero solidam nemo veniet, nisi qui illac transiverit.
Fonte: Leibniz, Leibnizens Mathematische Schriften, Herausgegeben Von C.I. Gerhardt. Bd. 1-7. 1850-1863. Halle. The quotation is found in vol. 7. on page 326 in ”Dissertatio Exoterica De Statu Praesenti et Incrementis Novissimis Deque Usu Geometriae”. Link https://archive.org/stream/leibnizensmathe12leibgoog
Fonte: Geometry and Monadology: Leibniz's Analysis Situs and Philosophy of Space by Vincenzo de Risi. Page 123. Link https://books.google.no/books?id=2ptGkzsKyOQC&lpg=PA123&ots=qz2aKxAYtp&dq=Dissertatio%20Exoterica%20De%20Statu%20Praesenti%20et%20Incrementis%20Novissimis%20Deque%20Usu%20Geometriae%E2%80%9D&hl=no&pg=PA123#v=onepage&q&f=false

„Even in the games of children there are things to interest the greatest mathematician.“

—  Gottfried Leibniz

Il y a jusque dans les exercices des enfants ce qui pourrait arrêter le plus grand Mathématicien.
Discours touchant la méthode de la certitude et de l'art d'inventer pour finir les disputes et pour faire en peu de temps de grands progrès (1688–1690)

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