Catechism of the Catholic Church §227 — excerpt
It means trusting God in every circumstance, even in adversity. A prayer of St. Teresa of Jesus wonderfully expresses this trust:
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. Teresa of Jesus, Poesias 30 in the Collected Works of St. Teresa of Avila, vol. III, tr. K. Kavanaugh OCD · O. Rodriguez OCD (Washington DC Institute of Carmelite Studies, 1985), 386 no. 9. tr. John Wall