Philosophy and Good

The greatest thing about reading philosophy is that it makes you question everything, the worst part is that there are not very many people around to talk out the questions.  Hence, this post.

I have been reading a lot about what is good, and right.  My favorite bit was Aristotle saying that a man with a purpose is good, the most good a man can be in fact.  My knee jerk answer is to agree with him full heartedly because in my mind there is few greater evil in society then a person without purpose

So here is my dilemma.  What is this word good.  Everyone uses it, I would wager it is used almost every day. But I can't seem to fit a consistent definition to it.  The dictionary says:

Good, adj, noun, interjection, adverb

1. morally excellent, virtuous, righteous

        2. satisfactory in quality, quantity, or degree

3. of high quality; excellent

4. right; proper

But it seems everyone has their own meaning to good and apply their own morals, and agendas to good.  So does that mean in order for you to do what 'ole Aristotle says is good is to twist good to be what you want it to be, or to you follow what society says is good, or the church, or your friends, or the government?  Looking at all five mentioned parties I would dare say that good has a lot of contradictions in its implementation.  

So can you have a philosophy, any philosophy if the core word that defines actions purpose and worth is so flexible and inconsistent?  Or is philosophy not generalizable because the definition of good, and pursuit in good's name is so personal? 

This may be a moot point and many of you may think why argue or talk about good, good is self evident or that good is good and I should know it.  But I don't and to excise and study a philosopher's words I have to first speak the language, and since good is the crux of most all of them, I need to hold down good's flexibility to move forward.  

And this may be why people need religion and are drawn by the thousands to follow it, because religion can define good.  Or maybe it is why I am drawn to many of you because we think our goods have the same definition.  

So role your eyes,  write back your comments or both, but it may be hard to type.

Cheers

Zachary