Predestination is a doctrine in Calvinism dealing with the question of the control that God exercises over the world. In the words of the Westminster Confession of Faith, God "freely and unchangeably ordained whatsoever comes to pass." The second use of the word "predestination" applies this to salvation, and refers to the belief that God appointed the eternal destiny of some to salvation by grace, while leaving the remainder to receive eternal damnation for all their sins, even their original sin. The former is called "unconditional election", and the latter "reprobation". In Calvinism, some people are predestined and effectually called in due time to faith by God, all others are reprobated.

The Westminster Confession of Faith, or simply the Westminster Confession, is a Reformed confession of faith. Drawn up by the 1646 Westminster Assembly as part of the Westminster Standards to be a confession of the Church of England, it became and remains the "subordinate standard" of doctrine in the Church of Scotland and has been influential within Presbyterian churches worldwide.