Dear Mr. Mathew George,
A knowledgeable person, as per your thinking, is not at all required to give answer to your query or doubt. Almost 90% of the Christians know that the Holy Church is founded by Jesus Christ on the rock-like faith proclaimed by Simon Peter. Hence, Jesus Christ is the foundation or corner stone of the Church and it is guided by the Holy Spirit and survived on the faith proclaimed by the Apostle Peter, to whom it was revealed by the Heavenly Father. Thus, the Holy Trinity took part in the foundation of the Church.
Jacob V Joshua, New Delhi