I read this in a devotion today.

I thought it needed to be passed on.

Discouragement is a tool of Satan.  The story is told that Satan was "going out of business."  All of his tools were offered for sale.  They were attractively displayed on a table.  What an array- hatred, envy, jealousy, deceit!  One harmless-looking one, much worn, was priced higher than any of the others.  "What is that tool?" someone asked.  "Discouragement,"  was the reply.  "Why is it so expensive?"  Satan answered, "Because it is more useful to me than any of the others.