Snip from one of Fr. Wathen's sermons where he describes the birth/beginnings of the Church, but he never mentions the "soul of the Church"....
"The Acts of the Apostles was written to describe the beginnings of the Church [...] The Church, which celebrates it's birthday on Pentecost, comes forth as an infant from the side of the crucified Christ. And like an infant, it is complete, it wants for nothing that we recognize as the essentials of the faith, nor does it want for anything with respect to it's power or jurisdiction. But, it is rudimentary in all that it possesses, even it's doctrine has gradually to be developed - that is, to be enunciated and rendered into a theological format.
The moral law which Christ had taught the Apostles will be developed also, which is to say that the Spirit of Christ will take the Ten Commandments and refine and expand them so that now the Christian morality is the most noble concept that the world has ever known for human behavior.
Likewise, the Liturgical Rite, the Holy Mass and the other sacraments, which have been given to us by Christ, are hardly more than basic direction that Christ gave the twelve Apostles. It will be for them and their successors to develop the rituals that surround these seven signs..."