"On June 5, 1527, he attached a programme of his lectures to the black-board of the University inviting all to come to them.

It began by greeting all students of the art of healing.

He proclaimed its lofty and serious nature, a gift of God to man, and the need of developing it to new importance and to new renown.
This he undertook to do, not retrogressing to the teaching of the ancients, but progressing whither nature pointed, through research into nature, where he himself had discovered and had verified by prolonged experiment and experience.

He was ready to oppose obedience to old lights as if they were oracles from which one did not dare to differ.
Illustrious doctor smight be graduated from books, but books made not a single physician.( 10) Neither graduation, nor fluency, nor the knowledge of old languages, nor the reading of many books made a physician, but the knowledge of things themselves and their properties.

The business of a doctor was to know the different kinds of sicknesses, their causes, their symptoms and their right remedies.