Thus God alone is the primary Unity, or original simple substance, from which all monads, created and derived, are produced.

Taking mathematics from the beginning of the world to the time when Newton lived, what he had done was much the better half.

One cannot explain words without making incursions into the sciences themselves, as is evident from dictionaries; and, conversely, one cannot present a science without at the same time defining its terms.

Indeed in general I hold that there is nothing truer than happiness, and nothing happier and sweeter than truth.

Every mind has a horizon in respect to its present intellectual capacity but not in respect to its future intellectual capacity.

Nothing is necessitated whose opposite is possible.

Reality cannot be found except in One single source, because of the interconnection of all things with one another.