For successful education there must always be a certain freshness in the knowledge dealt with. It must be either new in itself or invested with some novelty of application to the new world of new times. Knowledge does not keep any better than fish. You may be dealing with knowledge of the old species, with some old truth; but somehow it must come to the students, as it were, just drawn out of the sea and with the freshness of its immediate importance.
Alfred North WhiteheadThe vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and if need be, die for it.
Alfred North WhiteheadLearning preserves the errors of the past, as well as its wisdom. For this reason, dictionaries are public dangers, although they are necessities.
Alfred North Whitehead