Morality existed long before Jesus.And if this life is it, why bother with morals. They are nothing more than an ancient myth of acceptable behavior, designed by old men to control people and perpetuate their own position of influence or power.
Somehow, that sounds familiar. Oh right, that's one of the primary, worn out arguments against faith.
So then, can someone explain that if I abandon the moral precepts of my faith, why I should substitute the moral precepts of man.