“‘May be able to comprehend with all saints what is the breadth, and length, and depth, and height.’—Ephes. iii. 18. 　In these words four things are noted, which are necessary to us for salvation. Firstly, charity, by which we love our friends and enemies: ‘What is the breadth,’ Gloss. Which signifies the expansive nature of charity, which extends even to our enemies. Secondly, perseverance, that we finally continue in charity; ‘and length;’ Gloss. That which is the length of charity is the length of perseverance. Thirdly, right intention, that we may set before ourselves God only as the reward of our actions. ‘And height.’ This is is that which lifts the soul on high, that God may be expected for a reward. Fourthly, that we may not fail in all these things through pride. ‘The depth:’ it is humility which places man in the lowest state in regard to man, but in the highest state in relation to God. ‘He that humbleth himself shall be exalted,’ S. Luke xviii. 14.” St. Thomas Aquinas, Published 99 Sermons, Sermon XXXI