Grumbling or Unity in Humility

The three readings today have a common theme - grumbling.  We find the Israelites grumbling against Moses and God in the wilderness. In the gospel reading, the religious leaders seek to trap Jesus by their questions.  Meanwhile Paul in his letter to the Philippians both warns against grumbling and shows us the attitude we should have (unity in humility) as well as the means by which we can do that.