I think it is partially a numbers game. The Bible asks us to evabgalize and be a good Christian witness. To the extent the “numbers” are not good there is evidence of us not doing what Jesus asks us to do. Saying it is not a numbers game is like a liberal saying it is the “good intentions” in the policy that matters, as opposed to looking at the results of the policy.
I don't buy that. We can evangelize all we want. But if the individual doesn't accept our work, or allow the Holy Spirit into their heart, our work isn't fruitful. What happens is beyond our means.
And, this gets us beyond the 'good intentions' idea of the liberal agenda. It's not the intentions that count but the results. And those are out of our hands.
Therefore, it's between God and Man. Either we accept or we don't. But enough will accept that there will always, always be a Christian community. Man is sin. Man will always reject God. But some will become true believers. And that's what counts.