I think I’m really gonna like this book:
To love God with all the heart is the sum of all duty. Love must be exercised according to the relations which we bear. When a parent loves his child, he feels bound to exercise parental authority over it for its benefit; but the love of a child towards a parent requires obedience. So love to God produces obedience; for it is impossible to love God supremely without a supreme desire to please him in all things. Hence this one principle contains, involved in it, perfect obedience to every divine requirement.
– John L. Dagg, Manual of Church Order, p. 9.