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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

The art of discovering the causes of phenomena, or true hypotheses, is like the art of deciphering, in which an ingenious conjecture often greatly shortens the road.
GOTTFRIED WILHELM LEIBNIZ

Art Discover Greatness Road Short True
It is necessary to believe that the mixture of evil has produced the greatest possible good: otherwise the evil would not have been permitted.
GOTTFRIED WILHELM LEIBNIZ

Believe Evil Good Necessary Possible Production
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 WILHELM LEIBNIZ

Action Constitution Estimate Greatness Karma Life Ourselves
We never have a full demonstration, although there is always an underlying reason for the truth, even if it is only perfectly understood by God, who alone penetrated the infinite series in one stroke of the mind.
GOTTFRIED WILHELM LEIBNIZ

Demonstration Full God Lying Mindset Perfection Reason Truth Understand
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 WILHELM LEIBNIZ

Dreams Enough Life Myself Reality
..This is why the ultimate reason of things must lie in a necessary substance, in which the differentiation of the changes only exists eminently as in their source; and this is what we call God.
GOTTFRIED WILHELM LEIBNIZ

Call Change Existence God Necessary Reason Substance Ultimate
If you have a clear idea of a soul, you will have a clear idea of a form; for it is of the same genus, though a different species.
GOTTFRIED WILHELM LEIBNIZ

Animal Clear Different Form Ideas Science Soul Yourself
Make me the the master of education, and I will undertake to change the world.
GOTTFRIED WILHELM LEIBNIZ

Change Education Master Myself World
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 WILHELM LEIBNIZ

Clear Fake Ideas Imagination Intellectual Man True
What is is what must be.
GOTTFRIED WILHELM LEIBNIZ

One Liner Philosophy World
There is nothing waste, nothing sterile, nothing dead in the universe; no chaos, no confusions, save in appearance.
GOTTFRIED WILHELM LEIBNIZ

Chaos Confusion Death Save Universe Wasted
Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.
GOTTFRIED WILHELM LEIBNIZ

Count Exercise Hide Music Soul
I also readily admit that there are animals, taken in the ordinary sense, that are incomparably larger than those we know of, and I have sometimes said in jest that there might be a system like ours which is the pocketwatch of some enormous giant.
GOTTFRIED WILHELM LEIBNIZ

Animal Myself Ordinary System
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 WILHELM LEIBNIZ

Accomplishment Greatness Law Myself Nature
The world is not a machine. Everything in it is force, life, thought.
GOTTFRIED WILHELM LEIBNIZ

Force Life Machine Thinking World
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.
GOTTFRIED WILHELM LEIBNIZ

Greatness Knowledge Ourselves Quantity Record Wealth Writing