Science is a systematic presentation of truth. Theology is the most important of all sciences. It is the science that treats of God and of man in his relation to God. It is a systematic presentation of revealed truth. As the basis of Astronomy is the universe of worlds revealed by the telescope, and as the basis of Geology is the crust of the earth, so the basis of Theology is the Divine revelation found in the Holy Scriptures. The Theology of Entire Sanctification, therefore, is a systematic presentation of the doctrine of entire sanctification as derived from the written word of God. Such a presentation we hope--with the help of the Holy Spirit, which we here and now earnestly invoke--to attempt to give in this book. May God bless the endeavor, and overrule our human weakness, to the glory of His Name. Amen. It is a lamentable fact that there is a large class of Christians to whom the subject of entire sanctification is a matter of indifference. They hope, with or without sufficient reason, that their sins are forgiven. They propose to live moral and useful lives, and trust, again with or without sufficient reason, that they will go to heaven when they die. The subject of holiness does not interest them. They suppose themselves to be doing well enough without it.