Catechism of the Catholic Church §2094 — excerpt
One can sin against God's love in various ways: - indifference neglects or refuses to reflect on divine charity; it fails to consider its prevenient goodness and denies its power.
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.