In many ways, the creature seems to have been like a baby when he first came to life. He says,
A strange multiplicity of sensations seized me, and I saw, felt, heard, and smelt at the same time; and it was, indeed, a long time before I learned to distinguish between the operations of my various senses.
He appears to be what Enlightenment philosopher, John Locke, called a tabula rasa, or blank slate. The creature knows nothing initially and can only begin to learn from the sensory information he receives. He describes his "fatigue" and the way he felt "tormented by hunger and thirst." He eats and sleeps a lot, and he cries a good deal; sounds a lot like a baby, doesn't it? Moreover, he says, "feeling pain invade me on all sides, I sat down and wept." Not knowing what else to do, he simply cries. He fixes his eyes upon the moon, almost like an infant would do with a large and bright object.
Soon, he "began also to observe, with greater accuracy, the forms that surrounded [him] . . . ." His senses become distinct rather than muddled, and his "mind received every day additional ideas." He learns quickly, even more quickly than a typical infant. After he encounters the DeLaceys, he begins to develop language and a knowledge of history and the world around him.