Please read the Scripture passage before the homily.
There is no lost document that describes how Jesus set up his Church. He did not tell Peter to go to Rome and call himself Pope. He did not instruct the Apostles to set up Cardinals or tell them how to appoint bishops, priests and deacons. These all came later. The first disciples and apostles went out and preached the word. They set up communities and, when they left, they appointed people to supervise the fledgling communities. This was a natural development. All movements start small, and, as they grow, they provide for the necessary new conditions.
The earliest positions were overseers and presbyters. At first the terms were interchangeable. Later they became distinguished. The Greek word for Overseer gives us the English word bishop. The word presbyter comes from the Greek word for Elder and shows up in the English word priest.
At the time of the letter to Titus, the two positions were becoming distinct. The first requirement for elders were the same as for any adult Christian in a family. The requirements for overseers, or bishops, were based on their behavior and reputation in public.
The task of Titus was to choose and appoint people to these offices who would give good example to the Christian people and would be able to propound and explain the Gospel to others by their learning and by their behavior.
Now, consider yourself as Titus. You know the criteria for the overseers and presbyters; how do you live them yourself so as to give example to the next generation of leadership? This is what Paul did for Titus and what Titus was to do for his community. It is, therefore, what we have to do for those who follow us. If we have learned Titus, then we must be Titus.