The Bible:
The Catechism of the Catholic Church (CCC)
Official Church Documents:
- Gaudete Et Exsultate, Apostolic Exhortation on The Call to Holiness in Today’s World, Chapter 3.
- Veritatis Splendor – Encyclical of Pope Saint John Paul II on The Splendor of Truth.
Other Sources:
- United States Conference of Catholic Bishops, Teaching on Human Dignity and the Beatitudes
- More about Blessed Pier Giorgio Frassati
- On Saint Francis