The devil, our cruel enemy, takes pleasure in aiding us to form false conscience and in troubling our peace of soul; he sometimes succeeds in making us believe that there is sin in everything, in order that, thus deluded, we may deprive ourselves of the happiness of participating in the Eucharistic Banquet, and so lose the precious graces which Our Lord distributes to souls that receive Him worthily. Take care not to become the sport of the spirit of darkness.
--St. Mary Euphrasia Pelletier, Conferences and Instructions