The 18 on whom the tower in Siloam fell
A good word about humility in light of disasters.
"...those eighteen on whom the tower in Siloam fell and killed them: do you think that they were worse offenders than all the others who lived in Jerusalem? No, I tell you; but unless you repent, you will all likewise perish." (Luke 13 1-5)
Therefore (because you are no better than they), humble yourselves, put away your self-righteousness and do not boast over your neighbor. The mercy of Jesus Christ is the only hope for any man. Only as we approach skeptics with this kind of humility that our only standing before God is his mercy, as beggars pointing other beggars to bread, as sinners leading other sinners to Christ, as those who recognize they have a log in their own eye removed by grace, yet sensitive of our weakness and Christ's strength, can we have the most impact on people for the gospel. As long as we are arrogant when we point out our neighbors' immorality with the law - then we have missed a great opportunity for the gospel.
Jesus is saying that no amount of religion or good works can save you. You and your whole city are no better than the persons who suffered this fate. There is no hope whatsoever to be had in yourselves and, as such, all need a Savior from the outside. Repent of trusting in your good works and your boasting over your neighbor, as if you were better. We are all responsible for natural disasters, suffering and the death that overtakes us all. Skeptics need to repent of their immorality but perhaps even more importantly, religious people need to repent of their morality. The number one characteristic of those whom Christ has intervened is that the word of God will shatter their self-complacency and cause them to renounce their self-righteousness. Those in whom God has done a work of grace are convicted of their woeful, guilty, and lost condition, apart from grace. This true view of self, continues throughout the Christian life as the first order of business. If not, and If I think I am better than my neighbor, or more moral, and therefore, by extension, somehow more deserving, then I have forgotten that it was mercy alone which saved me and mercy alone which keeps me there. Thus the more grounded we are in the knowledge of God's mercy toward us, the easier it is for us to maintain humility among our neighbors, regardless of how depraved we may be tempted to think they are.