Do you remember the old hymn "Trust & Obey"? It sounds so easy, but it's only simple. We see so often how merciful and faithful the Lord is even when we do not trust or obey. Humankind works really hard at not trusting and obeying God, but as we see in the Word that God has continued to stay faithful even when we are not. When it's hard to obey, it's an issue of trust.