Perhaps the toughest call for a coach is weighing what is best for an individual against what is best for the team. Keeping a player on the roster just because I liked him personally, or even because of his great contributions to the team in the past, when I felt some one else could do more for the team would be a disservice to the team's goals.
Tom Landry: an autobiography (ed. Zondervan, 1990) - ISBN: 9780310529101