Psalm 22:31
They shall come and proclaim his righteousness to a people yet unborn, that he has done it.

Gospel tracts are fantastic for young people or any Christians who have but little power and little ability, but nevertheless, wish to do something for Christ. They have not the tongue of the eloquent, but they may have the hand of the diligent. They cannot stand and preach but they can stand and distribute here and there these silent preachers.
Charles Spurgeon