To compel means to first bring those who have not been baptized to the Church to be baptized, and then disciple both the newly and previously baptized in the faith so they can grow. Remember, this is precisely what Jesus has commissioned us to do. For those who have reached the age of reason there must be an elementary level of understanding and confession of the faith equal to that which is expressed in the Apostle's Creed, before the sacrament is administered. For the children of confessing parents, no such requirement exists. Let us pray those days are over for good.
True discipleship takes time and effort.
It does not leave people at the font or the prayer altar, but rather brings them to the point where they can show themselves approved unto God through a regimented study of the Word. It brings them to the Holy Table where they can sacramentally feed upon Christ' s Body and Blood for strength. Let us be sure to follow the instructions Jesus has given us in His Commission, and the model the Apostles molded for us in Acts and the Epistles, in order to accomplish our task. Isaiah wrote in chapter 12. Being able to truthfully say the words of this hymn alone will answer many of the questions people have today.