Augustine of Hippo
The psalmody of the Law Indeed, when you reflect on the greatest blessings from God, on the statutes that He has imparted to you, and on the divine wisdom that has nourished your spirit, which descends from the Source of all truth, turn to the Psalms and praise the Lord with the melody of the ten-stringed instrument. The law embodies ten commandments, and within these commandments lies the essence of the psalmody. These commandments originate from God; they are bestowed upon us as a gift of Wisdom, proclaimed from the heavens. Therefore, take up your instrument and live out the law, which the Lord did not intend to abolish but to fulfill. Through love, you will achieve what you could not accomplish through fear.
Honor the Lord with musical instruments: present yourselves to Him as a living offering. (Rom. 12:1) Sing praises to Him using a harp with ten strings (Ps. 32:2): allow your body to serve the love of God and your neighbor, fulfilling both the three and the seven commandments.