Late life development - from the perspectives of spiritual development and gerotranscendence - has been studied using the Life History Approach followed-up by thematic semi-structured interviews with Iranian Sufis residing in Sweden. On the basis of this study and proceeding from the theory of Gerotranscendence, I have, in this paper, illustrated the distinct role of aging in the development towards wisdom and maturity when mystical ideas are already integrated into individuals’ ways of thinking. This is achieved by contrasting, in terms of certain gerotranscendent dimensions, an aged Sufi’s view of her/his Self and the surrounding world with that of a middle-aged Sufi.