"Experience does not err. Only your judgments err by expecting from her what is not in her power."

"All our knowledge has its origins in our perceptions."

"Nothing strengthens authority so much as silence."

"Poor is the pupil who does not surpass his master."

"Knowing is not enough; we must apply. Being willing is not enough; we must do."

"Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what it absorbs."

"He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast."

"The acquisition of knowledge is always of use to the intellect, because it may thus drive out useless things and retain the good."

"Wisdom is the daughter of experience."

"I thought I was learning to live; I was only learning to die."

"Science is the captain, practice the soldier."

"To develop a complete mind: study the art of science, study the science of art. Learn how to see. Realize that everything connects to everything else."

"Just as eating contrary to the inclination is injurious to the health, so study without desire spoils the memory."