16 Men swear by someone greater than themselves, and the oath confirms what is said and puts an end to all argument.
17 Because God wanted to make the unchanging nature of his purpose very clear to the heirs of what was promised, he confirmed it with an oath.
18 God did this so that, by two unchangeable things in which it is impossible for God to lie, we who have fled to take hold of the hope offered to us may be greatly encouraged.
1. God’s purpose does not change because God made a promise
2. God’s purpose does not change because God made an oath
3. God’s purpose does not change so be greatly encouraged