CCC 1766
Life in Christ›SECTION ONE MAN'S VOCATION LIFE IN THE SPIRIT›CHAPTER ONE THE DIGNITY OF THE HUMAN PERSON›I. Passions
"To love is to will the good of another." All other affections have their source in this first movement of the human heart toward the good. Only the good can be loved. Passions "are evil if love is evil and good if it is good."