I've read commentators who feel that the lawyer's question suggests a sense of entitlement, as he uses the word "inherit." Perhaps, so, but perhaps it also shows awareness that eternal life is a gift, even as one participates in doing/fulfilling/acquiring it somehow. I do not hear this as a question about ensuring that one gets to heaven and not hell, but a question about the whole matter and purpose of life itself. This is a "what is the meaning of life?" or "what is the chief end of man?" sort of questions. Westminster Shorter Catechism: What is the chief end of man? To glorify God and enjoy God forever.