God has given every Christian the responsibility of speaking for Him. No other creation is given this honour, even angels don’t have this great privilege of speaking for God. The Bible teaches that when God wins a man, He builds him and sends him to win others as well. Whether or not he realizes this, he’s still expected to win more people to Christ.
The prophet Elijah magnified his office as God’s spokesman. He was unhappy about the evil perpetrated by the king and the people of Israel. So he went to king Ahab and said, “Oh king, if you don’t repent and turn to the Lord, there shall be no rain in Israel for three and a half years, according to my word” (1 Kings 17:1). God didn’t instruct him to say this to the king, he was the one that decided to hold the rain for three and a half years. And for three and a half years, there was neither rain nor dew. Just one man who recognized the fact that he was God’s spokesman brought a whole nation to its knees until they all repented of their evil ways. Finally, he came back to the city after he was convinced that they were sober enough and prayed for rain and it did rain.
God gave us such a privilege so we can win souls to Christ and that’s one of the important reasons He left us on earth after our salvation. Otherwise, the moment you were born again you would have been taken to heaven. We’re being built up by the Holy Spirit through the Word to win souls and continually increase our capacity to influence our world with the power of the Kingdom of God. He indisputably expects our influence to increase consistently as we grow in the knowledge of His Word and prosper the Kingdom of God with more souls.