So shall My word be that goeth forth out of My mouth: it shall not return unto Me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.—Isaiah 55:11.
SOMETIMES it looks as if God’s servants fail. When Herod beheaded John the Baptist, it looked as if John’s mission was a failure. But was it? The voice that rang through the valley of the Jordan rings through the whole world to-day. You can hear its echo upon the mountains and the valleys yet, “I must decrease, but He must increase.” He held up Jesus Christ and introduced Him to the world, and Herod had not power to behead Him until His life-work had been accomplished.
Stephen never preached but one sermon that we know of, and that was before the Sanhedrim; but how that sermon has been preached again and again all over the world! Out of his death probably came Paul, the greatest preacher the world has seen since Christ left this earth. If a man is sent by Jehovah, there is no such thing as failure.
 Moody, D. L. (1900). The D. L. Moody Year Book: A Living Daily Message from the Words of D. L. Moody. (E. M. Fitt, Ed.) (pp. 130–131). East Northfield, MA: The Bookstore.