Catechism of the Catholic Church §310 — excerpt
But why did God not create a world so perfect that no evil could exist in it? With infinite power God could always create something better.
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.
Also cites: St. Thomas Aquinas, STh I, 25, 6 · St. Thomas Aquinas, SCG III, 71
