Our word will not return empty
Charles SpurgeonPoor Jeremiah! But why do we say that? The weeping prophet was one of God's most special servants, and he was honored by Him above many. Jeremiah was hated for telling the truth. The word that was very sweet for him, was bitter for his listeners; however Jeremiah was accepted by his Lord. He had been commanded to remain faithful, and then the Lord would continue to speak through Jeremiah. He had to deal bravely and faithfully with men, and carry out the Lord's cleansing work in relation to the professors of his day, and then the Lord gave him this word: "You shall be like my mouth."
What a great honor! Shouldn't every preacher, yeah, every believer aspire to it? How wonderful it is that God speaks for us! We will expose a sure and pure truth, and we will speak it with power. Our word will not return empty; it will be a blessing to those who receive it, and those who reject it will do so at their own risk. Our lips will feed many. We will awaken those who sleep and call the dead to life. Oh dear reader, pray for this to happen with the one who writes these lines, and with all the servants sent by our Lord.
Source: The Bank of Faith Checkbook. Translation by Allan Roman.
http://www.spurgeon.com.mx/chequera/meditames/mayo.pdf