From time to time, we are insensitive and behave in a way what hurts someone"s feelings. Afterward, when we feel guilty and down in the dumps, friends can reassure us. This positive interaction is therapeutic, and much less than visits to a psychologist.Adolescence and age are the two stages in lives when the need for friendship is crucial. In the former stage, teens are plagued by uncertainty and mixed feelings. In the latter stage, older people are upset by feelings of uselessness and insignificance. In both instances, friends can make a dramatic difference. With close friends in their lives, people develop courage and positive attitudes. Teenagers have the moral support to assert their individuality; the elderly approach their advanced years with optimism and an interest in life. These positive outlooks are vital to cope successfully with the crises inherent in these two stages of life.