"Grind on me, test me," Tim Tebow recently told Sports Illustrated's Peter King. "I feel I've prepared my whole life for this." He was talking about the Senior Bowl in Mobile, Ala., where Tebow's been huffing his way through brutal workouts before an audience of NFL scouts. The University of Florida quarterback could have just as easily been talking about his upcoming Super Bowl commercial. During the big game on Feb. 7, the doe-eyed, block-chested football star will appear alongside his mother, Pam. Together they'll tell the story of Tim's birth: how Pam's pregnancy was threatened by a tropical disease (the family was living in the Philippines, as missionaries), doctors told her to abort the child, and she refused. And now look at her kid: Heisman winner, preacher, Christian heartthrob. At a press conference last week, Tebow said that he's "always been very convicted" about the wrongness of abortion "because that's the reason I'm here."