Now, God is triune -- Father, Son, and Holy Spirit -- whose sovereign majesty deserves to be adored, whose truth ought to be acknowledged, and whose love deserves to be accepted, through our negative appetite, rational faculty, and positive appetite, in our deeds, words, and affections. Therefore, there is a threefold commandment on the first tablet corresponding to these three aforementioned duties: submissive adoration, truthful oath-taking, and sacred observance of the Sabbath.
[St. Bonaventure, Breviloquium (5.9.4), Monti, tr., Franciscan Institute Publications (St. Bonaventure, NY: 2005) p. 205.]