74 One detail about the passers-by does stand out: they were religious, devoted to the worship of God: a priest and a Levite. This detail should not be overlooked. It shows that belief in God and the worship of God are not enough to ensure that we are actually living in a way pleasing to God. A believer may be untrue to everything that his faith demands of him, and yet think he is close to God and better than others. The guarantee of an authentic openness to God, on the other hand, is a way of practising the faith that helps open our hearts to our brothers and sisters. Saint John Chrysostom expressed this pointedly when he challenged his Christian hearers: “Do you wish to honour the body of the Saviour? Do not despise it when it is naked. Do not honour it in church with silk vestments while outside it is naked and numb with cold”. Paradoxically, those who claim to be unbelievers can sometimes put God’s will into practice better than believers.
Source: Fratelli Tutti (Vatican.va)