What is the whole purpose of the Bible from cover to cover?
The whole purpose of the Bible, from cover to cover, is to bring lost humanity to a knowledge of salvation. God's longsuffering—His patience—is salvation, because He is not willing that any should perish but that all should come to a knowledge of salvation.
Les explains that this Book's purpose, from cover to cover, is to bring lost humanity to a knowledge of salvation. He connects this to the longsuffering, or patience, of the Lord being salvation. Peter reiterates that the whole scope of God's patience is to bring the lost man to a place of salvation, since God is not willing that any should perish but that all should come to a knowledge of salvation.