Vatican II calls us to a life of holiness. Sometimes I think that many believe that is we pray a lot, and do not sin, or at least very often. The Act of the Apostles shares with us that a life of holiness is about prayer and worship, but also includes testimony and works of charity. That latter includes the corporal and spiritual works of mercy. More so we must know what and why we believe as we do. Christians are to be filled with peace and joy as they participate in the mystery of faith they profess.
I think that we still erroneously believe that following Jesus, and living faithfully, will guarantee endless days of happiness. The Peter and John scenario remind us that living our faith is a difficult thing, and that people will dislike us for what we say and do. And it is a lot more that questions about the Eucharist or Mary. We hold on to the respect of the dignity of life and the sanctity of marriage. It is easy to believe that if we simply change our teachings - but that would not be being faithful to the scriptures.
Our Faith really calls us to imitate this intimate relationship that Jesus shares with the Father. I was telling the seventh grade today that they would have a great advantage over many of their peers. and even those older than them, if they studied the teachings of their faith. For us too we move into an adult relationship God the Father, through the Son. The Paschal Mystery frees us from Sin and death and redeems our righteousness. This is serious business.
Faith filled persons worship the Father in spirit and in truth. We must obey the teachings of God. More over we transform ourselves into His image and likeness. What God has begun in us we bring to completion.