The essay is meant to demonstrate how philosophy greatly assists in spreading faith.
I would like the essay to focus on the following three frameworks/models.
1. Semiotics utilising the works of Pierce to explain the Trinity and thus explain the faith
2. The model of the Church as the Body of Christ, which enables believers to understand their role in the Chruch and its relationship to the Church
3. The concept of being
This essay should take the position of the Roman Catholic Church. I have attached a few documents that could be of help.
Also, gaining access to the following paper will greatly help. 
Fides et Ratio (Only Chapters 1 and 7 are relevant)
Rohr, David. “God the Object, Sign and Interpretant: The Semiotic Logic of the Christian
Trinity.” Philosophy & Theology 31, no. 1 & 2 (2019): 97-119