The next time you feel like GOD can't use YOU, just remember...
Noah was a drunk
Abraham was too old
Isaac was a daydreamer
Jacob was a liar
Leah was ugly & her husband loved her sister 
Joseph was abused & falsely accused
Moses had a stuttering problem & was shy
God used a mule to admonish a prophet
Gideon was afraid & wanted proof
Sampson had long hair and was a womanizer
Rahab was a prostitute
Jeremiah was a boy and cried a lot 
David had an affair and was a murderer
Elijah was afraid & depressed
Isaiah preached naked
Jonah ran from God & complained when God saved people he hated
Naomi was a widow
Ruth was an Ethiopian, non-Jew, black woman & one of Jesus' ancestors 
Job was afraid and went bankrupt
John the Baptist was homeless, ate bugs and wore rags
God used a pig to get a wayward child to go home
Peter denied Christ 3 times
The Disciples fell asleep while praying
Martha felt used and worried about everything
The Samaritan woman was divorced, more than once & living with a man not married to
Zaccheus was too small
Paul was so religious he was killing the saints 
Timothy was young & had stomach problems
AND Lazarus was dead!
No matter who you are or what you have done in the past, God can use you to your full potential. Besides you aren't the message, you are just the messenger.
God bless you