Chapter 27 summarizes Reformed sacramental theology. It states that sacraments were established by God as "signs and seals" of the covenant of grace to represent Christ and his benefits, to visibly differentiate members of the church from the rest of world and draw them to God's service. The confession teaches that in every sacrament there is a spiritual relation between the sign and what is being signified; because of this, the names and effects of one are attributed to the other. The effectiveness of a sacrament depends upon the work of the Holy Spirit and the words of institution, which contains a promise of benefit to worthy receivers. The confession teaches that only ordained ministers can provide the sacraments, of which there are only two: baptism and the Lord's Supper.