Luke 14:23
And the master said to the servant, ‘Go out to the highways and hedges and compel people to come in, that my house may be filled.

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