I looked for some things around the house to illustrate my example. I thought about dirty versus clean but decided that meant I would have to clean something first (so that was obviously out).
But I thought that the picture of the cross on top of the church would get the point across (with the added benefit of not having to clean anything). The blue sky wouldn't be nearly as beautiful if we never had a cloudy day. I guess that we wouldn't appreciate God's gifts without some of the troubles that life has in store for us.