context1: He had the <strong>concept</strong> that every living being could reincarnate in its own species. In other words, human beings could be reborn as human only. His <strong>belief</strong> was based on the analogy of plant life.
context2: Set theory is a <strong>concept</strong> in mathematics that allows an understanding of what numbers belong to a group, or set. A bounded set would describe a group with clear in and out definitions of membership. The Christian church has largely organized itself as a bounded set, those who share the same <strong>beliefs</strong> and values are in the set and those who disagree are outside.