Parable symbolism

When I want to find a perspective behind the symbolism of the parable, I look to Catholic writings, they embrace the symbolism so much more than my fundamental literalist upbringing. So here is one that grabbed me:

Recall that Jesus' parables are intended to both inform and challenge. It's easy, in hearing this gospel, to distance ourselves from the Pharisee. But notice that if we do so – thinking, for instance, "I'm glad I'm not like him" – we end up committing the same sin of pride! People who are religiously inclined can easily struggle with self-righteousness and judgmentalism.