As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.

Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.

The motive power is the cause of all life.

Truth was always but the daughter of time.

Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature because in her inventions nothing is lacking, and nothing is superfluous.

The most beautiful words of love are told in silence for a look.

Where the spirit does not work with the hand, there is no art.