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.

I do not conceive of any reality at all as without genuine unity.

God's relation to spirits is not like that of a craftsman to his work, but also like that of a prince to his subjects.

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

He who understands Archimedes and Apollonius will admire less the achievements of the foremost men of later times.

The present is big with the future, the future might be read in the past, the distant is expressed in the near.

There is no way in which a simple substance could begin in the course of nature, since it cannot be formed by means of compounding.