A middle-aged woman has a heart attack and leaves her body in a "near death experience." She sees a bright light and a voice says, "It's not your time to go. You still have another 30 years to live.”  Immediately she goes back into her body and lives again.

The woman decides she has a new reason to live, so she schedules major cosmetic surgery: a face-lift, liposuction, and tummy-tuck. She dyes her hair to cover up her gray, making her look 10 years younger. The next day when she crosses the street, she is hit by a speeding car.  She dies again, leaves her body, and sees the bright light.  

"Hey, what happened?" she complains. "I thought you said I had another 30 years?"

The voice says, "I’m sorry, but I didn't recognize you." 

Kent Crockett's Sermon Illustrations, www.kentcrockett.com