From Dr. Michael Brown, debating with Jewish apologists who question original sin:
Of course, it is possible to point to oustandingly moral individuals, such as the Chafetz Chayyim in Judaism or Mahatma Gandhi in Hinduism. But these seeming exceptions actually prove the rule of the pervasive nature of human sin.
"Really?" you say. "How so?"
Let me answer your question with three questions of my own. (1) Why do men like this stand out in their generation? Why are such individuals so rare? It is because we are a sinful lot. And even someone like Mahatma Gandhi had the fatal flaw of being a devoted idol worshiper, something Judaism forbids for Gentiles too. (2) What do these people say about themselves? Aren't they far more critical of themselves—and certainly far less impressed with themselves—than their admirers are? (3) Would the saintliest rabbi say that he had no need of atonement? Would he say he could stand before God without pleading for mercy? Then how much less can the "average Jew" trust in his or her own righteousness? Let me say it again: We all fall short.
The above quote came from one of Dr. Brown's books on Jewish evangelism entitled "Answering Jewish Objections to Jesus." Although dialogue with Jews (Dr. Brown is a Jew) is the key focus, I think what he had to say is certainly applicable to all of us. We all are capable of getting on a high horse. We love (as the human race) to hold certain individuals up such as Mother Teresa, Gandhi, etc. But all of us (even them) are fallen and are in need of a Risen Savior.
There are people who will argue with that. There are people who will argue cleverly with anything. The truth is the truth. Jesus is the only way. Don't like that very much? Too bad.
Sola's note: I need to clarify something here. My purpose in posting the above was for those who think their good works are sufficient to enter Heaven. The last line was aimed at those within the church who are beginning to take on a universalist bent. Universalism is not the message of Scripture.