“The theologian who has no joy in his work is not a theologian at all. Sulky faces, morose thoughts and boring ways of speaking are intolerable in this science. May God deliver us from what the Catholic Church reckons one of the seven sins of the monk—taedium [loathing]—in respect of the great spiritual truths with which theology has to do. But we must know, of course, that it is only God who can keep us from it.”
Karl Barth, Church Dogmatics, II/1, p. 656.