After some other mistakes, I learned to go into business only with people whom I like, trust, and admire. As I noted before, this policy of itself will not ensure success: A second-class textile or department-store company won’t prosper simply because its managers are men that you would be pleased to see your daughter marry… [however] we do not wish to join with managers who lack admirable qualities, no matter how attractive the prospects of their business. We’ve never succeeded in making a good deal with a bad person.

-Warren Buffett, “Mistakes of the First Twenty-five Years (A Condensed Version),”Berkshire Hathaway 1989 Chairman’s Letter (via msg)

Warren Buffett's writing is, in my experience, highly considered and thoughtful.