It seems to me that there is really only one sin (if you’re speaking religiously/spiritually) or vice (if you’re speaking morally/philosophically). That one bad thing is perversion. I’m talking about the dictionary definition here. Perversion is “a distortion or corruption of something’s original state or meaning”. As Shakespeare said: virtue turns vice when it’s misapplied.
The perversion of desirable human traits is the cause of most of humanities faults. The path to goodness is not found in Aristotle’s mean between the two extremes. It is not found in moderation. There is no middle path, there is no left or right. There are only virtues and their perversions.
So avoiding vice/sin, while never easy, is at least straightforward when you look at it this way. Of course, you still have to think it through for yourself. You have to look at the virtues (which pretty-much all people of all walks of life agree on) and avoid perverting them from their purity. So here’s my tentative list of some of the biggest vices and the virtues they are perverting:
Freedom perverted is Irresponsibility
Respect perverted is Authoritarianism/Blind Obedience
Loyalty perverted is Nationalism
Selectivity perverted is Intolerance/Racism
Discretion perverted is Ignorance
Skepticism perverted is Cynicism
Diplomacy perverted is Deceit
Harmony perverted is Mindless Conformity
Cooperation perverted is Docileness
Acceptance perverted is Apathy
Innocence perverted is Denial
Emotion perverted is Anger
Fear perverted is Violence