Obstacles cannot bend me. Every obstacle yields to effort.

The men of experiment are like the ant; they only collect and use. But the bee...gathers its materials from the flowers of the garden and of the field, but transforms and digests it by a power of its own.

To make a perfume, take some rose water and wash your hands in it, then take a lavender flower and rub it with your palms, and you will achieve the desired effect

I have offended God and mankind because my work didn't reach the quality it should have.

People of higher talent work, even if they seem to do nothing

The motive power is the cause of all life.

Those who are enamoured of practice without science are like a pilot who goes into a ship without rudder or compass and never has any certainty of where he is going. Practice should always be based upon a sound knowledge of theory.