In boldest, most dramatic terms, it was the study of philosophy that made me become a Christian; it showed me that the pat answer of, "That's nice that Jesus is God for you; he's just not God for me" really makes no sense because contradictory claims can't both be true. (They could both be wrong -- in this case, perhaps none of the world's religions are correct -- but they can't all be right.)

So I could say that philosophy affected not only this life, but the one to come.

That "analytical" approach to life has extended to other day-to-day things -- the standard need to nail down premises/assumptions that lead to a conclusion, or examining whether a conclusion necessarily follows from the premises given.

Philosophy taken alone can be pretty "cold" when it's not balanced with the reality of human emotions, but it's a good foundation to start from.

So, "providing eternal life" would be the direct answer to the question, but "being a pretty handy tool" would sound a bit more pragmatic as a response.