An Interesting Observation from the Old Testament

Today I was reading a number of different chapters in the book of Exodus, and I found something interesting. The priesthood of God was going to be given to the Israelites, but the only ones who showed themselves worthy of it were the children of Levi. They were given the Aaronic Priesthood.
Also interesting, is how Joshua, who had been away from the camp during the time of the Golden Calf, was not part of the idolatry, and therefore did not sin. Joshua is the man who was called to be the prophet after Moses was translated.

What can we learn from this?
I think that we can learn that it is important to choose God's side. If everyone around us is sinning, we should abstain, or better yet, leave so as not to be tempted to join. We should remember that our goal is to follow God, not golden idols, or idle pleasures. God is the source of joy and light. It makes perfect sense that our lives would be dark and depressing if we turn away from Him.