belief and practice

Dot read something out in lecture today that I've been finding really challenging lately, about what we believe and what we do.

If what I say I believe doesn't really reflect how I live, then do I really believe it? Because I can live as though I don't believe at all, yet still claim belief. But that doesn't work, becuase believing is nothing without practice. There's no point in saying you believe something and living as though you don't because who does that help? It only makes your beliefs void in other people's eyes, and shows that you place no value on what you believe.

If there were no heaven, would we still worship? I was thinking of this because a lot of people say that christians are christians because they want to believe in life after death. So if there were no promise of eternal life, would we still worship God or want to have a relationship with him?