"Not only is the case presented, we believe beyond controversy, for the miraculous signs and gifts of the Holy Spirit to-day, but to those who have been extreme in the use of the gifts, and have over-emphasised the speaking in tongues, this work presents a challenge. It tells what the gift of tongues is for, and what it is not for. Also it explains the purposes of the gifts of the Holy Spirit, how, when, and where they are to be used. To every open-minded Christian it will be evident that any system of worship without these gifts is incomplete." James McWhirter.