We all love to hear about the grace, mercy and love of God. And rightly so. But there is another side to the "God coin." God is holy and righteous. He must be reverenced, and His word honored by learning it and keeping it as closely as we can. He is our Creator, the Most High, and as He Himself says in Malachi, "a great King." Israel and Achan learned a hard lesson about reverencing God.
Most of us don't like it in the dark because too much bad stuff happens there. Too many people don't realize there is a spiritual darkness where a lot of bad stuff happens as well. Saul found this out when he was persecuting the church and Jesus appeared to him in a great light and shined the light of truth into his heart. Saul came out of the darkness then, and his life was forever changed for the good.