The single greatest contribution you can make to a group is your own passionate pursuit of God. This is true for two reasons.
As you diligently study God’s Word, pray, worship, confess sin, witness to non-Christians, and cultivate the various expressions of a healthy Christian faith, your zeal will influence the entire group. Your passion will spur others on “toward love and good deeds” (Heb 10:24). Do you realize that your example can accomplish more than a month’s worth of teaching and exhortations from the leader? You are the proof that a passionate life is possible…and not just for leaders.
(Greg Somerville in C.J. Mahaney Ed., Why Small Groups?, p. 35)