Wikipedia:Contents/Religion and belief systems/Intro
Religion is the adherence to codified beliefs and rituals that generally involve a faith in a spiritual nature and a study of inherited ancestral traditions, knowledge and wisdom related to understanding human life. The term "religion" refers to both the personal practices related to faith as well as to the larger shared systems of belief.
A belief system can refer to a religion or a world view. A world view (or worldview) is a term calqued from the German word Weltanschauung ([ˈvɛlt.ʔanˌʃaʊ.ʊŋ] (help·info)) Welt is the German word for 'world,' and Anschauung is the German word for 'view' or 'outlook'. It is a concept fundamental to German philosophy and epistemology and refers to a wide world perception. Additionally, it refers to the framework of ideas and beliefs through which an individual interprets the world and interacts in it.