While a true revival in its essence belongs only to God's people, it always brings with it a blessing for the other sheep who are not yet of the fold. If you drop a stone into a lake the ring widens continually, till the farthest corner of the lake feels the influence. Let the Lord revive a believer and very soon his family, his friends, his neighbors, receive a share of the benefit; for when a Christian is revived, he prays more fervently for sinners. Longing, loving prayer for sinners, is one of the marks of a revival in the renewed heart. Since the blessing is asked for sinners, the blessing comes from him who hears the prayers of his people; and thus the world gains by revival. Soon the revived Christian speaks concerning Jesus and the gospel; he sows good seed, and God's good seed is never lost, for he has said, "It shall not return unto me void."
(C.H. Spurgeon, What Is a Revival?, From the December 1866 Sword and Trowel.)