Strange but true.
I've an ex-colleague who is not a christian has the status on her MSN messenger that goes like this:
"I can do everything thru HIM who strengthens me"
Thus I replied her, "Phil 4:13".
But she told me a lot of people asked her the same question if she has converted herself to Christianity, but it's just so happen that she thought about the phrase and wrote it but still having the same religion.