Gottfried Leibniz

"There is nothing in the intellect that was not first in the senses, except the intellect itself."

"Music is the pleasure the human mind experiences from counting without being aware that it is counting."

"The present is big with the future."

"Nature is not subject to injustice."

"There is no better way to understand ourselves than by understanding others."

"God is perfect, and creation reflects this perfection in infinite variety."

"Truths are of two kinds: reasonable truths and factual truths."

"I am so in favor of the actual infinite that instead of admitting that Nature abhors it, as is commonly said, I hold that Nature makes frequent use of it everywhere."

"The principles of sufficient reason ought to be one of the greatest and most fruitful of the principles of human knowledge."

"Happy people are grateful, and grateful people are happy."

"The smallest things often conceal the greatest secrets."

"To love is to find pleasure in the happiness of others."

"It is unworthy of excellent men to lose hours like slaves in the labor of calculation."

"There is nothing absolutely impossible to learning."

"If we do not succeed, we run the risk of failure."

"Nothing happens without a reason, nothing at all."

"Each substance expresses the whole universe in its own way."

"The more you know yourself, the clearer your vision becomes."

"Pleasure and pain are not states that exist independently; they are aspects of the same experience."

"Time is not an absolute reality but an order of succession."

"Truth is never found in what is repeated; it is always found in what is unrepeated."

"The wise adapt themselves to circumstances."

"All is for the best in this best of all possible worlds."

"Everything in nature is perfect, though we may not perceive that perfection."

"The human mind is like a monad, a reflection of the entire universe."

"Knowledge comes from understanding causes, not merely observing effects."

"The greatest perfection of a mind is to understand both itself and other things."

"Justice is charity according to wisdom."

"Courage is not the absence of fear, but the ability to act despite it."

"The soul is the entelechy of the living body."