They say your smartphone is the hand you don't wash. That device we carry everywhere mirrors something troubling about our spiritual lives: the sin we've grown so accustomed to that we've forgotten it's even there. How comfortable have you become with certain sins? Most of us carry some transgression that has settled into our routine, becoming as familiar and unnoticed as our phone. Thomas à Kempis observed this spiritual blindness centuries ago: sin accumulates in ordinary m