Laurie Colwin said this quote

How simple it could be! The answer to the problem of being anything was being it. How admirable Teddy was! From the ashes of his broken childhood he had formed a decision to be a cheerful person, a do-gooding scientific type with knowledge of English literature. That he had undercurrents of sadness as long and deep as a river was not the point. He had claimed a territory for himself and did not think too much about the complications.