 Philosophers still found ways to be true to their discipline, and yet recognize the constraints imposed by Catholicism as the official religion of the State. Perhaps the best example is the work of Andrés Bello (1781–1865), who explored a wide range of philosophical sources, especially those of the Scottish Enlightenment. However, he never questioned the importance of religion in general, and Catholicism in particular. His Filosofía del entendimiento was published posthumously in 1881, but substantial parts of this work appeared in the 1840s.