A vow of faithfulness is a sacred assertion, a positive declaration expressing a woman's intention to remain loyal to herself, to preserve allegiance to herself even when challenged or opposed. And such a vow, according to Reilly, is the necessary first step to achieving balanced, rich, and reciprocal relationships with others.

Women of all ages, from all walks of life, are vowing loyalty to their own lives. And the results of these woman-affirming ceremonies and rites of passage are life altering: they unleash positive life energy and uncover unexplored gifts and talents. Drawing on stories of many women and their personalized vows, I Promise Myself features a write-your-own vow section and provides step-by-step guidelines for composing your own vow of faithfulness—a process that invites you to reassert your commitment to yourself and begin an adventure of self-discovery and self-celebration.