I believe that God is overseeing all of Tebow's passes, but he's also overseeing the typing and reading of this paragraph. He's overseeing the Denver Broncos, but he's also overseeing the Boston Celtics (much as it may seem otherwise at present), the Museum of Modern Art, and the playtime of your nephew. He's in control of all things. In this sense, which is called "secondary" causation (God's oversight of all things), the Lord is directing Tebow's life.
But is God directly intervening on the football field in the same way that, for example, he did to cause the virgin birth of Luke 2 (in what is called "primary causation")? That I don't know. It's not clear to my human eyes how this all shakes out. I do know that the Lord is working everything out according to his wise and mysterious counsel which, try as we might, we cannot fully understand.
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