In this thought-provoking book, Father Ezra Sullivan provides the forgotten key to discovering the soul’s potential for greatness: heroic habits. A habit, it is argued, is what makes us into saints or sinners. Just as the body can become stronger through exercise and effort, or weaker through wounds or neglect, so the entire person can develop an almost permanent state of goodness or evil through habituation to virtue or vice. Sullivan argues that habits both reveal and shape who you are; they speak about what you have been, and they predict what you will be.