Conscience has often lent its sanction to the grossest errors, and prompted the greatest crimes. Did not Saul of Tarsus, for instance, drag men and women to prison; compel them to blaspheme; and stain his hands in saintly blood, while conscience approved the deed—he believed that he was doing God service. . . . Read the Book of Martyrs, read the sufferings of our own forefathers; and under the cowl of a shaven monk, or the trappings of a haughty churchman, you shall see conscience persecuting the saints of God, and dragging even tender women and children to the bloody scaffold or the burning stake. . . . So far as doctrines and duties are concerned, not conscience, but the revealed Word of God is our one only sure and safe directory.

– William Guthrie

1620 – 1665