One of the devil's most effective strategies for keeping the church weak and ineffective is to "wear out the saints." The primary way he does this is to get Christians involved in good works that the Lord did not call them to do. When we do things with the Lord, His yoke is easy, His burden is light, and we actually find refreshment for our souls while we are working. If we try to do work without Him, we will wear out and burn out, as well as not bear any real, lasting fruit.