Morality, in a general sense, is a system based on three basic concepts:
a Goal, Good/Right, and Evil/Wrong.
Despite all the bloated theological
ideas of absolute right and wrong the concepts are much more plastic
than one might think.
Good/Right is, naturally, whatever helps towards the acquisition or
achievement of the goal. Evil/Wrong is whatever detracts from this
persuit.
The Goal can be anything- a new car, ending world hunger, getting into Harvard, reducing human suffering, seducing Natalie Imbruglia (had to throw this one in, lest I be accused of being off topic), everlasting life in Heaven with Hicks' deity, or whatever.
Generally individuals operate under the influence of several moral systems at a time. Old systems may cease to exist as their goals are achieved or wane in importance as life progresses and be replaced by new concerns, new goals, and new moral systems.
All the goals, systems, and codes are not necessarily of equal value. For example: consider the goals of a new car (NC) and everlasting life in Heaven with Hicks' deity(EL). Now- it would be very easy to get a new car simply by stealing one- but- since "Thou shalt not steal" this option may not be available as it is Bad in the EL code. Whether or not this hypothetical individual becomes a car their depends on which moral code takes precedence- NC or EL.
My point is this- there is no such thing as the "ONLY way to be decent and moral"- Decency and morality depend on one's concepts of Good and Bad- which in turn depend on one's ultimate or primary goal. And there are just as many goals as there are objects, ideas, ideals, or dreams.