Many Western people are also becoming uncomfortable about the absence of spirituality in their lives. They do not necessarily want to return to pre-modern religious lifestyles or to conventionally institutional faith. But there is a growing appreciation that, at its best, religion has helped human beings to cultivate decent values. Islam kept the notions of social justice, equality, tolerance and practical compassion in the forefront of the Muslim conscience for centuries. Muslims did not always live up to these ideals and frequently found difficulty in incarnating them in their social and political institutions. But the struggle to achieve this was for centuries the mainspring of Islamic spirituality.
— Karen Armstrong, Islam