Loneliness can be found in many life experiences, such as loss, rejection, illness, failure, as well as in success, creativity, or meditation. This chapter is unique because it includes loneliness as part of the social and emotional intelligences. The author helps readers shift their perception of loneliness from something to be avoided or defended against to a necessary exploration of their solitude in the universe. Solitude is argued as a necessary experience for developing social and emotional intelligences. This chapter explores the benefits of solitude for wellbeing and growth across the lifespan.