Maximizing Moral Virtue

[Aegon]

If men are free to invent their own meaning and assign their own value to the words right and wrong what is stopping the gambler from telling his wife that gambling is good?
What will prevent the murderer from telling you that he is a more evolved being which has the right to naturally select his victims for death in the hopes of wiping out their gene pool?
What is stopping a corrupt mind from aiding the destruction of society?

You see I ask these questions because unlike you I believe that moral good takes effort, inspiration, and endurance. Sometimes you have to turn down offers of money, fame and sexual pleasure in order to withstand corruption. Especially if you want to be in a position of power or influence. Jesus spent most of his time in conflict with the religious authorities of his day and I consider the Catholic church to be the prime example of what it means to be a modern day Pharisee.

Ok, first off, I'm confused by your logic. Everybody invents their own meanings and assign their own value to words, even if they subscribe to a specific religious belief system. Obviously Christians, for example, are not a monolith. There are different sects, and even within sects individuals believe what they believe and discard the rest.

Secondly, every example you chose here can be proven to be "wrong" on a secular basis, no Christian teachings required. You don't need religion to teach you the idea that we are all fundamentally alike. We all share the same sort of conscious experience, and therefore it is crystal clear that you do not want to say or do something that causes suffering in another. IT's not a religious teaching, it's a demonstrable fact of life. This is Jesus' golden rule, but he wasn't the first to say it and he won't be the last. This means that...

• ...murder is obviously wrong, despite the dumb natural selection argument you used as an example. 
  
• ...goading somebody into doing something that will ultimately hurt them, like gambling addiction, is obviously wrong. Also there's nothing in your example that makes the gambler's wife suddenly okay with gambling? lol. He can say it's good all day, she can still divorce him before he bets their house on an NFL game.
  
• The last example you used is vague and makes no real sense. Also wouldn't it be even easier for a corrupt mind to aid the destruction of society if he did it under the guise of a widely-practiced religion?
  

Seriously man, Christianity is overrated. You don't need to pledge yourself to some non-existent god to have a fleshed out system of ethics. Basic human empathy works just fine. Funny enough, I find that many Christians here in the U.S. seem to have a profound lack of empathy towards others. They've been conditioned this way by politics.