And the corollary: run, run fast and far, when someone tells you what a good Christian they are.
A friend of mine in high school once told me this little gem of wisdom from his father (it was so good I remembered it all these years):
When you fall in love with a woman and think you want to marry her, close your eyes and visualize what she looks like first thing in the morning. Then ask yourself if you want to wake up to THAT for the rest of your life. If the answer is yes, then marry her.
Of course, Rodney Dangerfield had another take on getting married. He said, “Marry a woman who can cook. The sex will wear off but you’ll always be hungry.”