Take care not to meddle in things which do not concern you, nor even allow them to pass through your mind; for perhaps you will not then be able to fulfil your own task.
-- St. John of the Cross

It should be our principal business to conquer ourselves and, from day to day, to go on increasing in strength and perfection. Above all, however, it is necessary for us to strive to conquer our little temptations, such as fits of anger, suspicions, jealousies, envy, deceitfulness, vanity, attachments, and evil thoughts. For in this way we shall acquire strength to subdue greater ones.
-- St. Francis De Sales