Classicly

Judson wasn’t a self-made man, as I was. He had inherited his share in the business, and a considerable fortune, besides. The reason he was so anxious to have me as a partner was that for six years I had carried all his business cares, even his private affairs. Yes, he needed me—though, no doubt, in a sense, he was my friend. Who wouldn’t have been my friend under the circumstances? But, having looked out for his own interest and comfort in selecting me, why should he have expected that I wouldn’t look out for mine? The only kind of loyalty a man who wishes to do something in the world should give or expect is the mutual loyalty of common interest.