Vanity - it’s easy to mask, easy to forget, and easy to justify. We hide it behind dignity and poise. The sins connected to this weakness aren't quite as severe as those associated with pride, gluttony, and lust. But it can eventually lead up to some serious problems. And it can keep us from becoming an instrument of Christ.The solution (humility) might be one of the most difficult virtues to master, but John the Baptist seems to have had a pretty good handle on it. Here’s the guy who baptized C.