Our conscience is based on our own values, mind you, so we can still screw up if we listen to it and our values are wrong, even if our consciences are clear.
We have discussed this before, Tammy. I might relocate the thread if I dedicated a little time and effort. My contention has been that one does not need to believe in God or the Holy Bible to be a person of high moral values. Your reply was that you were not so sure. What determines whether or not our values are wrong? Certainly some of the moral lessons in the Bible are outmoded in today's context - slavery, capital punishment for minor offences, polygamy, genocide, etc - so does one need to pick and choose which values are right and which are wrong? If so, does it not follow that if our values are based on a simple pretext that we will carry one another and never do another harm (as what Jesus taught) then they cannot be wrong?
My BIL was an openly immoral man before he found the Watchtower. He philandered, he lied, he stole, he abused all manner of illicit drug. The change in him to a loving, law-abiding husband and father is what caused me to listen to him about the Watchtower. He remarked to me recently, within the context of the anger his mother has expressed toward him for shunning his DF'ed son, that he is still the man he always was, despite what his faith causes him to do. I disagreed with him, saying if he was the man I knew before his association with the Watchtower he would not be welcome in my house. But extrapolate that further. If it is faith (in this case faith in the Watchtower, but it applies generally to people of faith) that causes people to be good, then is it real or affected? I'm not sure what my BIL would do, how he would behave, if he suddenly lost the moral compass he acquired when he found "The Truth". For myself, it did not change when I lost my faith. If anything, I may have even become more sensitive to the needs of others, acknowledging that I am still vulnerable to being insensitive when I am not paying attention to my words and behaviours. But if someone needs faith in order to be a good and moral person, it stands to reason that that person is best avoided because he is not a good and moral person at his core, does it not?