St. Alphonsus in St. Peter's in Rome

 “Let us remember that the devil labors hard to disturb us in the time of meditation in order to make us abandon it. Let him, then, who omits mental prayer on account of distractions be persuaded that he gives delight to the devil. It is impossible, says Cassian, that our minds should be free from all distractions during prayer. Let us, then, never give up meditation, however great our distractions may be. St. Francis de Sales says that if in mental prayer we should do nothing else than continually banish distractions and temptations, the meditation is well made.” 

St. Alphonsus