Of all persecuted sects, the Baptists stand forth as most prominent, simply and only because they aim at a more complete and thorough reform than any others ever attempted. They teach that Christ's kingdom is not of this world; that the church is not a national, political, or provincial establishment; but a congregation of holy men, separated from the world by the receiving of the Holy Spirit.
John Quincy Adams (1876). “Babtists, the Only Thorough Religious Reformers”, p.21