Continuing the conquest of Canaan, the Israelites partial obey God. They were half-hearted in their obedience. God calls this half-hearted obedience...disobedience.
How are we like these Israelites? When do we settle and not obey God courageously and boldly? When do we say "I can't" when God hears us say "I won't."
The key to pressing on in obedience and service is to trust in God, in his strength, in his power to save, power to forgive, and that he accepts us (not for our deeds) but because of what Jesus Christ has done.