This is an excerpt from Udo Schnelle’s Apostle Paul: His Life and Theology, translated by M. Eugene Boring (Grand Rapids: Baker, 2005), page 221:
The Goal: Building Up the Church. The Spirit that proceeds from God and is effective in Christ is manifest in a variety of ways, but it is â€œone and the same Spiritâ€ (1 Cor. 12:4). It leads into a wealth of diversity but not into the poverty of division. It belongs to its essence to establish unity, because it is itself “one Spirit”. The Spiritâ€™s unifying work is seen especially in the fact that it generates what benefits the church (12:7, “the common good”) and what serves its “edification” (building up; cf. 1 Cor. 14). All charismatic gifts must be measured by this fundamental principle: “Let all things be done for building up” (14:26).