Cities across the world celebrate Mardi Gras with colorful parades and over-the-top parties. Then Ash Wednesday arrives … Sigh. Lent has begun. You hear about devout friends giving up seemingly innocent things like chocolate or stressing out as they try to live a more perfect life during six grueling weeks—for reasons you don't completely understand. Sermons about penitence are preached, and guilt soaks the congregation. Sound like a good time?! It's time to rethink Lent. Or at least see it f...