F O U N D A T I O N S 30 we give ourselves to Christ with all that we have and are, making a covenant of faithfulness to God and to our fellow members, whom we refer to as brothers and sisters. Lifelong commitment is integral to our vocation: we are convinced that Christ himself has called us to serve him in this particular way with these partic- ular brothers and sisters, come what may. We cannot ­separate from one another, since “we, though many, are one body in Christ, and individually members one of another.” Our promise of faithfulness is what makes mutual trust possible. Membership is open to all who have received a call to the service of Christ in brotherly and sisterly community and who desire to follow this call with us. In order to take vows, a candidate must have reached the age of twenty-one, understood the teachings of Christ, received believer’s baptism and affirmed all points of the Apostles’ and Nicene Creeds, and been accepted by the church community after a time of testing and discernment. 34 Those seeking membership should do so only out of love for Christ. Their vocation will become clear to them only as they obey him in the things of daily life, following him step by step on the way of discipleship. Full surrender to Christ is the basis of discipleship. This means repentance and conversion, of which baptism is the sign. Anyone who has not yet received believer’s 2 Tim 4:6–7 Deut 6:4–9; 11:13–14 Mark 3:31–35 2 Pet 1:3–11 Eph 4:1–3 Rom 12:4–5 1 Jn 4:1 John 21:15–19; Phil 3:7–11 Luke 9:23–27; Mark 10:21 John 12:24–26 Acts 2:37–41