Jesus points out a flaw in the Pharisees which could equally apply to all of us; they use God and their displays of love for God to promote themselves rather than the Kingdom.
We all like to be admired, we all like to be praised for what we do. The Pharisees like the places of honour at weddings etc. When the church is renovated, we envy those who get asked to sit at the front beside the bishop!
When we see someone greeted with the red carpet we say "who do they think they are?" There is always that little element of self promotion in each of us. We're only human.
What we as Christians need to recognize what this is, part of our fallen nature, a little pride creeping in and we should pray to God to rid us of it.