Catechism of the Catholic Church §2731 — excerpt
Another difficulty, especially for those who sincerely want to pray, is dryness. Dryness belongs to contemplative prayer when the heart is separated from God, with no taste for thoughts, memories, and feelings, even spiritual ones.
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.