Identities matter. I recently lost my credit card, triggering a host of worries and questions: Where and when did I last use the card? Did I leave it in my pants pocket? Is it on the floor of my car? Should I slowly look through every part of my wallet for the ninth time?

And Jesus said unto him, No man, having put his hand to the plough,
and looking back, is fit for the kingdom of God. (Luke 9:62)