Hebrews 6:16-20
16 People 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 set before us may be greatly encouraged.

19 We have this hope as an anchor for the soul, firm and secure. It enters the inner sanctuary behind the curtain, 20 where our forerunner, Jesus, has entered on our behalf. He has become a high priest forever, in the order of Melchizedek.

1. Because Hardships will Come.

John 16:33
33 “I have told you these things, so that in me you may have peace. In this world you will have trouble. But take heart! I have overcome the world.”

2. Because our hearts tend to drift.

Hebrews 2:1
2 We must pay the most careful attention, therefore, to what we have heard, so that we do not drift away.

3. Because we are too easily pleased.

Ephesians 5:8–10
8 For you were once darkness, but now you are light in the Lord. Live as children of light 9 (for the fruit of the light consists in all goodness, righteousness and truth) 10 and find out what pleases the Lord.