that may be given to the Body has any effect in appeasing the want. The Beginning of Philosophy, then, must be an intellectual want—a Hunger of the Soul.
'But all wants have their objects in which they seek and find their gratification. What then is the object of the hunger of the soul?
'Answer—Knowledge.
'Philosophy is a Hunger of the Soul after Knowledge. What is Knowledge?—reduced through various intermediate stages to question, what is the common and essential quality in all knowledge—the quality which makes knowledge knowledge? Answer approached by raising question: What is the essential quality in all food—the quality which makes food food? This is obviously its physically nutritive quality. Whatever has the nutritive property is food; whatever has it not is not food, however like excellent beef and mutton it may be. So in regard to knowledge, its common and essential quality—the quality in virtue of which knowledge is knowledge—is its nutritive quality. Whatever nourishes and satisfies the mind is knowledge, as whatever nourishes and satisfies the body is food. The intellectually nutritive property in knowledge is the common and essential property in knowledge. What is the nutritive quality in knowledge? Answer (without beating about the bush)—Truth.
'What is Truth? Answer—Truth is whatever is supported by Evidence.
'What is Evidence? Evidence is whatever is supported by Experience. What is Experience? Here we stop; we can only divide Experience into its kinds, which are two, Experience of Fact and Experience of Pure Reason. Observe the manœuvre in the last line by
