The sacrament of baptism has been the subject of much controversy in the Scottish church, especially in the seventeenth century, when everyone born north of the Tweed seems to have been, more or less, a theological disputant. In the First Book of Discipline, in the framing of which Knox had much to do, it was laid down that, "In baptism, we acknowledge nothing to be used except the element of water only; wherefore, whosoever presumeth to use oil, salt, wax, spittle, conjuration, and crossing, accuseth the perfect institution of Jesus Christ of imperfection, for it was void of all such inventions devised by men." The abjuring of conjuration seems to refer to a formula of exorcism prescribed by the first Prayer Book of Edward VI., to be used in the rite of baptism. Concerning the use of the cross in baptism there has been an enormous amount of controversy, and very opposite views are still held. Dr Renaud, who wrote a ponderous volume on the subject in 1607, says: "It is as unfit to make a cross a memorial of Christ as for a child to make much of the halter or gallows wherewith his father was hanged." The Service Book of 1637 enjoined the use of the cross in baptism, and as that book is said, by Spalding, to have been introduced in many parts of the country, it may be concluded that the practice existed thereafter in some Scotch churches. As to other baptismal ceremonies, Dr Edgar observes, in his "Old Church Life in Scotland," that the principles laid down by Knox "are the principles on which the Church of Scotland has always acted. She has uniformly endeavoured, except during a brief interlude of Anglican innovation prior to 1638, to make her sacramental forms square with the pattern and precepts set before her in Scripture." Another question concerning which there has been much controversy, is the lawfulness or otherwise of private baptism. In 1618, when the historically famous "five articles," framed by James I., as king of both England and Scotland, were sent to the General Assembly for sanction and approval, their adoption by that body raised a storm of indignation and opposition which was not allayed until they were abjured by the General Assembly in 1638, and the proceedings of the Assembly held at Perth in 1618 were declared null and void. One of the articles objected to was that which pronounced "that baptism might be administered at home when the infant could not conveniently be brought to church." This was objected to as papistical, and denounced as introducing a new and false doctrine of baptism, calculated to create a superstitious belief that there was some spiritual efficacy in the act of sprinkling a few drops of water on an infant's face, in the name of the Trinity, thereby giving ground for the belief that baptism is essential to salvation. This doctrine, though taught by the Church of England, has not been accepted by the Church of Scotland since the Reformation.