Catechism of the Catholic Church §20 — excerpt
The use of small print in certain passages indicates observations of an historical or apologetic nature, or supplementary doctrinal explanations.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.