William Harvey

The blood is in a perpetual motion, like the ebb and flow of the sea.

I have not been deterred by the difficulty of the subject, nor by the novelty of my opinions.

The heart is the sun of the microcosm, as the sun is the heart of the world.

I have not been ashamed to confess my ignorance, when I have found myself in error.

The circulation of the blood is a truth which cannot be denied, without denying the evidence of our senses.

I have not been influenced by the authority of any man, but by the dictates of reason and experiment.

The heart is the beginning of life, the first to have life, and the last to lose it.

I have not been afraid to publish my discoveries, though they may be contrary to the received opinions of the age.

The circulation of the blood is a discovery which will immortalize my name.

I have not been ambitious of praise, but desirous of truth.

The heart is the seat of the soul, and the source of all vital heat.

I have not been ashamed to retract my errors, when I have been convinced of them.

The circulation of the blood is a truth which will prevail, in spite of all opposition.

I have not been discouraged by the difficulties of the undertaking, but have persevered with unwearied diligence.

The heart is the noblest part of the body, and the most essential to life.

I have not been afraid to expose my opinions to the censure of the learned, being confident that they will stand the test of examination.

The circulation of the blood is a discovery which will be of infinite benefit to mankind.

I have not been influenced by the love of novelty, but by the love of truth.

The heart is the center of the animal economy, and the source of all vital functions.

I have not been ashamed to acknowledge my obligations to those who have gone before me, and to profit by their labors.