Before Prospero's arrival, Caliban had the island to himself, living there in a state of savage innocence. Prospero attempts to educate him, in return for which Caliban shows him all the qualities of the isle. The experiment is brought to a halt when Caliban tries to rape Miranda, and Prospero abandons any hope of educating him further. He does not, however, sever their relation and turn Caliban back to the forest; he changes
its nature and, instead of trying to treat Caliban as a son, makes him a slave whom he rules by fear. This relation is profitable to Prospero:
as it is
We cannot miss him. He does make our fire, Fetch in our wood, and serve us in offices That profit us
but it is hard to see what profit, material or spiritual, Caliban gets out of it. He has lost his savage freedom:
For I am all the subjects that you have Which first was mine own king
and he has lost his savage innocence:
You taught me language and my profit on't Is, I know how to curse
so that he is vulnerable to further corruption when he comes into contact with the civilized vices of Trinculo and Stephano. He is hardly to be blamed, then, if he regards the virtues of civilization with hatred as responsible for his condition:
Remember
First to possess his books, for without them He's but a sot, as I am.
As a biological organism Man is a natural creature subject to the necessities of nature; as a being with consciousness and will, he is at the same time a historical person with the freedom of the spirit.
The natural can never desire too much or too little because the natural good is the mean—too much and too little are both painful to its natural well-being. The natural, conforming to necessity, cannot imagine possibility. The closest it can come to a relation with the possible is as a vague dream; without Prospero, Ariel can only be known to Caliban as "sounds and sweet airs that give delight and hurt not." The animals cannot fall because the words of the tempter, "Ye shall be as gods," are in the future tense, and the animals have no future tense, for the future tense implies the possibility of doing something that has not been done before, and this they cannot imagine.
Man can never know his "nature" because knowing is itself a spiritual and historical act; his physical sensations are always accompanied by conscious emotions. It is impossible to remember a physical sensation of pleasure or pain, the moment it ceases one cannot recall it, and all one remembers is the emotion of happiness or fear which accompanied it. On the other hand, a sensory stimulus can recall forgotten emotions associated with a previous occurrence of the same stimulus, as when Proust eats the cake.
It is unfortunate that the word "Flesh," set in contrast to "Spirit," is bound to suggest not what the Gospels and St. Paul intended it to mean, the whole physical-historical nature of fallen man, but his physical nature alone, a suggestion very welcome to our passion for reproving and improving others instead of examining our own consciences. For, the more "fleshly" a sin is, the more obviously public it is, and the easier to prevent by the application of a purely external discipline. Thus the sin of gluttony exists in acts of gluttony, in eating, drinking, smoking too much, etc. If a man restrains himself from such excess, or is restrained by others, he ceases to be a glutton; the phrase "gluttonous thoughts" apart from gluttonous acts is meaningless.