Burk Parsons, Assured by God, 2006, p. 19-20.
Our perseverance is a gift from God. In our salvation, God blesses us with assurance through His gift of perseverance (2 Thessalonians 3:5). However, many Christians lack full assurance of their salvation because their understanding of assurance is founded on the constantly changing emotions of their hearts rather than on the eternal Word of God.
Burk Parsons, Assured by God, 2006, p. 19-20.