If we are to produce love as the greatest manifestation of moral character, it is meaningful to consider how the entrance of sin into the world has effected mankind. There are a variety of theories, philosophical and Biblical, that are worth considering. As with all things, we are aiming for the most well-rounded, Biblical perspective that we can develop. Whatever view we embrace, there will be inescapable practical ramifications. Consequently, we will briefly consider, both, the theory with its Biblical support and the practical implications as we look into the topic of sins effect on the moral capabilities of the human race.
First, it is clear that Scripture reveals that sin is real. This is in contrast to certain cultural beliefs that question whether it is legitimate to identify some things as right and others as wrong, or if all things are merely a matter of preference and opinion.
Second, identifying whether something is or isn’t right must involve what God has communicated about moral obligation. This is in contrast to mere human opinion and preference. We should be able to see the confusion created when a person or people dismiss God from the equation.
Third, from a Biblical perspective, sin relates to moral choice. In other words, sin is not a thing – sin does not possess physical qualities. Wrong and selfish choices (sin) can manifest itself in a physical way (fornication, for example) and effect physical creation (murder, for example), but sin is the choice to pursue such action.
And finally, for the purposes of this post, the first act of sin in the earthly, human realm, is associated with the disobedience of Adam and Eve. Paul states, “…through one man sin entered the world…” (Ro.5:12).
The above information sets the stage for considering how the sin that entered the world by way of Adam has affected the rest of humanity, moral agency and moral character. In closing, I will simply quote from the rest of verse 12 which says, “…death spread to all men, because all sinned…” (Ro.5:12). Our question is, in part, what is involved in the phrase “all sinned?”
 It is true that in an attempt to make certain points about human involvement with and bondage to sin, Paul uses language that personifies sin (Ro.7:8-23). This will be addressed in due time.