The Lord's field is the world, in which He has His children who are the good seed: and there the Devil has also his cockle, the ungodly. They are two great armies, under two great and powerful leaders, as has been the case from the very first. But the field is also the heart of each of us; particularly and individually, in which our Lord if we will let Him, is now seeking to sow the good seed of His grace, that he may bring forth fruit unto God; while the Devil on his part is alert to spread the seed of vice, and disobedience to God's commandments. But as he cannot make himself master of our hearts without our consent, he seeks to insinuate himself into us unawares, and to that end is watchful to seize on any time and occasion in which he finds us less or not at all on the watch over ourselves. What a motive for each to keep in mind our dear Lord's warning: Watch ye and pray, that ye enter not into temptation. Let not carelessness, nor assumed security, cause us to slumber, seeing that we have an enemy so powerful, so active, so vigilant, to effect our ruin. Watch ye, stand fast in the faith, do manfully and be strengthened.
- text taken from Daily Bread - Bring a Few Morning Meditations for the Use of Catholic Christians by Father Richard Waldo Sibthorp