A revival meeting is a series of Christian religious services held to inspire active members of a church body to gain new converts and to call sinners to repent. Those who lead revival services are known as revivalists (or evangelists). Nineteenth-century Baptist preacher Charles Spurgeon said, "Many blessings may come to the unconverted in consequence of a revival among Christians, but the revival itself has to do only with those who already possess spiritual life."[1] These meetings are usually conducted by churches or missionary organizations throughout the world. Notable historic revival meetings were conducted in the United States by evangelist Billy Sunday[2] and in Wales by evangelist Evan Roberts.[3] Revival services occur in local churches, brush arbor revivals, tent revivals, and camp meetings.[4]