and, "A stone of stumbling, and a rock of offense." For they stumble at the word, being disobedient, whereunto also they were appointed.

 The point is clear. So long as a brick lies by itself it is useless; it becomes of use only when it is incorporated into a building. So it is with the individual Christian. To realize his destiny he must not remain alone, but must be built into the fabric of the Church. 