Severity of Atheist belief

Much of the argument on whether God exist or in some case relevant derives mainly on the topic of life meaning and value. As the atheist would attest, the reason that we know that God doesn't exist comes not as any faith based conclusion but as a reason of the mind. The only meaningful explanation for a Christian will be that faith supersedes logic and wherever logic ends faith begins. The atheist may then respond with relativism against all absolutes as his own faith: the other end of faith. But as mere logic and faith will conclude, that the mind can sometimes do more harm than good.