Why Preach The Gospel To Every Creature?
If God the Father has predestined only a limited number to be saved, if God the Son died to redeem only those given to Him by the Father, and if God the Spirit quickens only God’s elect, then what is the use of giving the Gospel to the world at large, and where is the warrant for telling sinners that “Whosever believeth in Christ shall not perish but have everlasting life”?
First, it is of great importance that we should be clear on the Gospel itself. The Gospel is God’s good news concerning Christ, and not concerning sinners, Romans 1:1,3. It is God’s purpose to proclaim far and wide the truth that His own Son became “obedient unto death, even the death of the cross.” The Gospel is God’s witness of the glorious person and work of Christ in having saved sinners by His blood and righteousness.
Second, repentance and forgiveness of sins are to be preached in the name of the Lord Jesus “unto all nations.” In time, the Spirit of God regenerates all that God has chosen to save in Christ, and will cause their path to cross with the faithful Gospel message. They must hear the Gospel, and believe it, before they can rejoice in the knowledge of sins forgiven at the cross. The Gospel is God’s winnowing fan: it separates the chaff from the wheat, and gathers the latter into the silo.
Third, it is sufficient for us to know that God commands us to preach the Gospel to every creature. It is not for us to reason about the consistency between this and the fact that “few are chosen” It is for us to obey. Those in whom He has revealed Christ in truth will desire to proclaim Him to a lost world, know that God will bless it to the calling out of every one whom He purposed to save from eternity.
By Ken Wimer
Jesus is LORD! 
Based on Scripture, do you think we are called to preach the Gospel at work?
Any work you do is for the glory of God.