In first Chronicles chapter 24,  Knowing God's Will.
We see the division of the priests. They were assigned they're positions by casting lots. Casting lots was done as a way of determining God's will. It was an acceptable way of doing things and even encouraged by the Lord. But since Pentecost, the Holy Spirit has been our guide to depend upon for determining God's will. We can trust God even through the times we don't feel him near. We can trust him to help and to guide us in and through all circumstances. John 16:13 says the Holy Spirit will guide us into all truth. And John 14:26 says the Holy Spirit will teach us all things. Therefore never cease to pursue the Holy Spirit and his help in your life. He can be trusted 100%!