Ps 33:2

“But wherefore doth man bless the Lord at all times? Because he is humble. What is it to be humble? To take not praise unto himself. Who would himself be praised, is proud: who is not proud, is humble. Wouldest thou not then be proud? That thou mayest be humble, say what is here written; "In the Lord shall my soul be praised: the humble shall hear thereof and be glad" (ver. 2). Those then who will not be praised in the Lord, are not humble, but fierce, rough, lifted up, proud. Gentle cattle would the Lord have; be thou the Lord's jumentum; that is, be thou humble. He sitteth upon thee, He ruleth thee: fear not lest thou stumble, and fall headlong: that indeed is thy infirmity; but consider Who sitteth upon thee. Thou art an ass's colt, but thou carriest Christ. For even He on an ass's colt came into the city; and that beast was gentle. ..."Be not ye as the horse or as the mule, which have no understanding." For horse and mule sometimes lift up their neck, and by their own fierceness throw off their rider. They are tamed with the bit, with bridle, with stripes, until they learn to submit, and to carry their master. But thou, before thy jaws are bruised with the bridle, be humble, and carry thy Lord: wish not praise for thyself, but praised be He who sitteth upon thee, and say thou, "In the Lord shall my soul be praised; the humble shall hear thereof, and be glad." ...”

“Then when he says, "In the Lord," the fruit of praise is presented. He says therefore, "In the Lord my soul shall be praised." For one always regards the good of a friend as one's own good. Hence he says, the praise of God is also my praise. If God is great, it is certain that his friend is great: Ps. 117: "The Lord is my strength and my praise." And he says "soul," because spiritual joy principally pertains to it. Next, when he says, "Let the meek hear," he leads others first to the cause of praise. Second, to the praise itself, at "Magnify." The beginning of praise is interior joy; hence he says, "Let the meek hear." And therefore they rejoice in all things that are of God, because the harsh do not rejoice but rebel. And he says, "Let them hear," because this joy comes from hearing of others who act well.”