On the one hand, it's better to get the beliefs out there early — you don't want to find out too late in the game, for instance, that one of you believes in contraception while the other does not.
And a rigorous exchange of ideas is healthy. Who wants to only converse with folks whose every response to you is, "Yes. I agree absolutely"?
But don't assume you'll be able to persuade him over time. For all you know, your own convictions might evolve into something entirely new.
We call this maturing.