I heard the first half of this quotation in the film What's Up Doc? It's stuck with me ever since; however, the last 8 words are new to me since Google. The pithy declaration below is that of Ralph Waldo Emerson, from Essays:
A foolish consistency is the hobgoblin of little minds, adored by little statesmen and philosophers and divines.
A "divine" is a theologian or a clergyman ...