But there is a new document from the CDF that I think is very good. I think that modern Catholics, be we clergy or laity should engage with the world, not to proselytize but to evangelize and help bring understanding to what the Church is about and to clarify our positions when we are misunderstood. And yes the "world" misunderstands us and either intentionally or ignorantly misrepresents us.
Several years ago when I was in Macon, Mercer University held a panel on same sex marriage and the issues surrounding sexuality. I was asked to be on the panel, but because it was a university setting I recommended that the university invite our young, articulate Polish parochial vicar to be represent the Catholic Church's views. He did a great job and was well received all the while promoting what the Catholic Church teaches. He witnessed to it in other words in what could have been a very hostile environment for him and Catholics. No one asked to become Catholic but there was better understanding about the Catholic Church's teachings.
The commentary below condemns once again the heresies of pelegianism and Gnosticism. Both in one form or another seperate the true Church from belief in Christ, a sort of go it alone mentality found among fundamentalist Protestants. They often say you can find Christ interiorly and be saved and then you go find a bible beleiving church that supports your faith which you discovered through a special knowledge of God.
I am not sure Catholics do that, in the south it is a Protestant mentality. But Catholics disengage from the Church because they are put off by her either in her teachings or how other Catholics act or the Church asks too much from them because it is both body and soul, spiritual and material. Think of those who leave the Church because of the sins of others or the Church asks for money too frequently to support her ministries or to build buildings to house her ministries, etc.
But with many Protestants becoming Catholic, especially evangelical Protestants, often they do not leave this idea that you can find Christ and live as a Christian simply with Bible in hand and no real dependence on the Church, her sacraments and the graces God mediates through her.
But here is the Crux article on the CDF's new document: