De parasito sive artem esse parasiticam

SIMON As far as the other arts are concerned, if there should be some discord in them, one might pass it over, thinking it excusable, since they are subordinate and their knowledges are not exempt from change. But who could endure that philosophy should not be one, and in better tune with itself than a musical instrument? Well now, philosophy is not one, for I see that it is infinitely many; yet it cannot be many, for wisdom is one.