No bubble is so iridescent or floats longer than that blown by the successful teacher.
"Look wise, say nothing, and grunt. Speech was given to conceal thoughts."
"The young physician starts life with 20 drugs for each disease, and the old physician ends life with one drug for 20 diseases."
"There are only two sorts of doctors: those who practice with their brains, and those who practice with their tongues."
"In science the credit goes to the man who convinces the world, not to the man to whom the idea first occurs."