Since Reason obliges us to do good to all who do good to us; a recognition of the existence and unity of God, and of His beneficence, shows the duty of serving Him.
Judaism
Duties of the Heart, Gratitude to God and Man
Source Bahya ibn Paquda, The Duties of the Heart, trans. Edwin Collins (1909), archive.org dutiesofheart01bahy (OCR corrigé) · Contents