What does Luke 18:11 mean?
Jesus' parable begins with a Pharisee and a tax collector at the temple, praying (Luke 18:10). Pharisees are known for being rule-followers. They not only obey the Mosaic law, but they also create and follow extra rules that specifically define the Mosaic law. Tax collectors are known for working with Gentiles and demanding more money from the people than is reasonable. They are ceremonially and morally unclean. Where Pharisees are generally admired by the people, tax collectors are openly despised.Pharisees cling to their reputation of being more righteous than anyone else. Even Jesus notes their righteous acts (Matthew 5:20). The Pharisee's prayer reflects this. He contrasts himself to swindlers, crooks, the unfaithful, and tax collectors. He may even think he's better than his fellow sect members. Jesus criticizes Pharisees for being swindlers, using the Mosaic law to bank money that should go to the care of their elderly parents (Mark 7:10–13). In some way Jesus doesn't clarify, they unjustly "devour widows' houses" (Mark 12:40). They commit adultery against God by loving their manmade traditions more than God's Law (Mark 7:6–9).
This Pharisee would do far better to emulate the man he condemns. The Pharisee holds up his legalistic deeds—which may have ulterior motives—as if they are good works deserving of praise. The tax collector knows he is a sinner and humbly begs for mercy. The Pharisee cheats God and seeks people's acclaim. The tax collector has cheated people—or so this parable assumes—but seeks God's forgiveness (Luke 18:12–14).
The only certainly true statement made by the Pharisee is that he is not like the tax collector.