During recent decades, it has become the practice of Christians in many churches and in university and college Christian Unions to commit one another to God’s grace and care with the words ‘May the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with us all’ (2 Corinthians 13:14). They are familiar words, but what do they actually mean? For what are we praying? So that we do not repeat these words without appreciating their full implication, Derek Prime explores them and considers the three Persons of the Trinity in their different, yet perfectly harmonious, relationship to every believer.