What does the Holy Spirit do? The Holy Spirit is often depicted as tongues or flames of fire, such as happened on the day of Pentecost. Fire warms and comforts us. – The Holy Spirit warms us and comforts us. Fire provides power – think of a locomotive (a massive chunk of metal) powered by steam – the Holy Spirit empowers us. Fire cleanses and purifies – so does the Spirit. Fire gives light to see – so does the Spirit. Fire is attractive – so is the Spirit.