William Harvey

The works of nature are the works of God.

Medicine is an art, not a science.

The human body is a machine, but a divine one.

I profess both to learn and to teach anatomy, not from books but from dissections; not from positions of philosophers but from the fabric of nature.

The heart of animals is the foundation of their life, the sun of their microcosm, that to which all powers reach, and which draws all their powers to itself.

All we know is still infinitely less than all that remains unknown.

The motion of the blood is circular and continuous.

Nature is a frugal mother, and permits nothing superfluous.

The heart is the centre whence life is carried to every part.

I avow myself the partisan of truth alone.

The blood is the instrument by which the heart performs its functions.

In truth, anatomy is the foundation of the whole art of medicine.

The circulation of the blood is the best discovery in medicine.

Man is only a reed, the weakest in nature, but he is a thinking reed.

The valves of the veins prevent the blood from flowing back.

Knowledge is the child of experience.

The heart's function is to generate animal heat.

Truth is the daughter of time.

The lungs serve to aerate the blood.

Medicine is the restoration of the natural order.