This is where I agree with jar that behavior (good,rational,mature behavior) is the indication of being on the right road. Not everyone on the right road needs to be outwardly religious but the fact is that if my particular belief is right and that Jesus is in fact the way to know God, Nobody on the right road would deny Him, though some may choose to simply behave and do good without the religious professions and theatrics. You could well be a humanist atheist your entire life, but again, if my belief is correct, it would only make sense that you had a time of communion and acceptance with God some day.
If we applied critical thinking, we would have to ask if it is possible for someone to have good, rational, mature behavior because of a belief in a deity that doesn't exist, and how we would tell the difference between behavior caused by a belief in a non-existent deity, and a belief in a real deity.