We all have one main purpose—to have a relationship with God, to bring glory to Him by the way we live our lives, by how we relate to Him and others (Matt. 22:37-39; Mark 12:29-31).
When we are walking in that purpose we are where we are meant to be, we are swimming in the river of living water. Doing what we are created to do. When we are not fulfilling that purpose we are frustrated, discouraged, depressed, brokenhearted, and frequently provoked to seek out something else that will fulfill the void.