This is a sermon comparing an upright walk with a perverted walk.
God never promised to remove all trials or to give us heaven on earth. However, He has promised that the man who separates himself from the world and gives himself over to the Lord will be blessed.
Sometimes the Christian life can be discouraging because of the things that surround us. We see the wicked prospering on every hand and at the same time we see the righteous as they suffer.
A covenant is a solemn agreement. The most important covenants in the Bible are those in which God makes a covenant with man: the Abrahamic Covenant, the Davidic Covenant, etc. Here is a covenant which man makes with God. The Israelites recognize the importance of God and covenant together to wholly follow Him.