From the moment we're born, our emotions begin to define us. As we grow, we direct those emotions both inward and outward. Some feelings reflect on our innermost lives-our sense of self. Many others reflect on those around us-our families, romantic partners, friends, and professional colleagues. At times, these emotions can be overwhelming. But if we are to live fulfilled lives, we must learn to holistically manage, and reap the benefits of, healthy internal and external relationships.

In her new book, "Emotions Simplified: A Practical Self-Help Workbook," personal growth specialist...