“There is no doubt that in the hearts of many people the presence of the Devil manifests itself by a kind of spiritual languor, prostration, and slothfulness for every good and useful work, especially for works of faith and piety requiring attention and soberness of heart, and for spiritual work in general Thus he strikes the heart with languor and the intellect with dullness during prayer, with coldness and indolence when it is necessary for us to do good—for instance, to have compassion upon those who suffer, to help those who are in need, to comfort those who are in sorrow, to teach the ignorant, to guide the erring and vicious into the way of truth.”
(St John of Kronstadt ‘My Life in Christ’)