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I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is in fact in nature.

Gottfried Wilhelm Leibniz

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 WILHELM LEIBNIZ

Excellence Lose Machine Man Slave Time
To love is to place happiness in the heart of another.
GOTTFRIED WILHELM LEIBNIZ

Happiness Heart Love Place
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.
GOTTFRIED WILHELM LEIBNIZ

Future Present Simplicity State Way
There are also two kinds of truths: truth of reasoning and truths of fact.
GOTTFRIED WILHELM LEIBNIZ

Deep Fact Kind Reason Truth
I do not conceive of any reality at all as without genuine unity.
GOTTFRIED WILHELM LEIBNIZ

Genuine Myself Reality Unity
I hold that it is only when we can prove everything we assert that we understand perfectly the thing under consideration.
GOTTFRIED WILHELM LEIBNIZ

Evidence Hold Myself Perfection Understand
In my judgment an organic machine new to nature never arises, since it always contains an infinity of organs so that it can express, in its own way, the whole universe; indeed, it always contains all past and present times.
GOTTFRIED WILHELM LEIBNIZ

Expression Infinity Judgement Nature Organ Past Present Time Universe
Each portion of matter may be conceived of as a garden full of plants, and as a pond full of fishes. But each branch of the plant, each member of the animal, each drop of its humors, is also such a garden or such a pond.
GOTTFRIED WILHELM LEIBNIZ

Animal Garden Philosophy Plant
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.
GOTTFRIED WILHELM LEIBNIZ

Diminsh Discover Greatness Nature Photograph Thinking Wonderful
There is nothing without a reason.
GOTTFRIED WILHELM LEIBNIZ

Philosophy Reason
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 WILHELM LEIBNIZ

Greatness Ground Judgement Ourselves Principle Reason
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.
GOTTFRIED WILHELM LEIBNIZ

Amount Delight Happiness Love Oneself
Men act like brutes in so far as the sequences of their perceptions arise through the principle of memory only, like those empirical physicians who have mere practice without theory.
GOTTFRIED WILHELM LEIBNIZ

Act Man Memories Practice Principle Theory
There is a certain destiny of everything, regulated by the foreknowledge and providence of God in His works.
GOTTFRIED WILHELM LEIBNIZ

Destiny God Himself Knowledge Regulation Work
He who hasn’t tasted bitter things hasn’t earned sweet things.
GOTTFRIED WILHELM LEIBNIZ

Bitter Hard Time Himself Sweet Taste Wisdom
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 WILHELM LEIBNIZ

Delight Experience Happiness Love Myself True