The Church is Catholic . . . that means all are welcome;
The Church is one . . . that means we have a Person — Jesus — and His moral teaching that unite us;
The Church is apostolic . . . that means that His teaching was entrusted to His apostles, and carefully handed-on by His Church. The sacred duty of the Church is to invite people, challenge people, to live the message and teachings of Jesus.
Blessed John Paul II used to say that the best way to love someone was to tell them the truth: To teach the truth with love. Jesus did that — He was love and truth in His very person — and so does His Church.
—from the blog post All Are Welcome by Timothy Cardinal Dolan