How is Wilson subtly characterized as a child?

Wilson sees love, passion, and forgiveness like a child might. He sees it in literal absolutes without any thought to the complexities of human emotion rooted in reality. He seems to have no personal experiece, like a child, in matters of the heart.

There he stood, with a border of grizzled locks beneath his skull-cap, while his grey eyes, accustomed to the shaded light of his study, were winking, like those of Hester's infant, in the unadulterated sunshine. He looked