Religion
Each religion has different ideas about these things. Each religion also has a "moral code" which is a set of beliefs about how humans should act. Each religion usually has their own type of "devotions" when people worship or pray. They often have rituals (special things that are always done in the same way) for certain times of the year or certain times of a person's life. Other words that are used for religion are "faith" and "belief system". Altogether, followers of religion can be known as 'believers', or 'the faithful'. Few people follow more than one religion at a time.