1 Corinthians 9:10
For if I preach the gospel, that gives me no ground for boasting. For necessity is laid upon me. Woe to me if I do not preach the gospel!

The power of a simple gospel tract, placed in the hands of a willing servant of God, can never be underestimated. It can lead a soul to Christ and transform a life of eternity.
Dwight L. Moody