This story is the good news (evangelion). In worship we signify it (leiturgia); in evangelism we proclaim it (kerygma); in fellowship we experience it (koinonia); in our ministry to each other and in our service to others we live it (deaconia). It is the very heartbeat of who we are.
–Robin Parry, Worshiping Trinity: Coming Back to the Heart of Worship, 20