Assurance is a primarily [[Protestantism|Protestant]] [[doctrine]] which states that the inner witness of the [[Holy Spirit]] allows the [[Justification|justified]] disciple to know that they are saved. [[Augustine of Hippo|Augustine]] was an early theologian to write about it. ''Assurance'' is a very important doctrine in [[Lutheranism]], [[Calvinism]] and [[Methodism]].
===John Bunyan===
Pilgrim's Progress: Hopeful speaking to Christian.<ref>[http://en.wikipedia.org/wiki/George_Offor Offor G] (1859), "The works of John Bunyan", Vol 3, Blackie & Son, p141. For download from archive.org . There is also a version with seventeenth century spelling, that is, Bunyan J (1847), "Pilgrim's Progress", Edr Offor G, Hanserd Knollys Society.</ref>
:"... all the law is not in the hand of Giant Despair. Others, so far as I can understand, have been taken by him, as well as we; and yet have escaped out of his hand."
===John Knox===