No one describes the mysterious infinite nature of human subjectivity quite like Charles Dickens.

A wonderful fact to reflect upon, that every human creature is constituted to be that profound secret and mystery to every other. A solemn consideration, when I enter a great city at night, that every one of those darkly clustered houses encloses its own secret; that every room in every one of them encloses it own secret; that in every beating heart in the hundreds of thousands of breasts there, is, in some of its imaginings, a secret to the heart nearest it! - A Tale of Two Cities