Act 18:26 He (Apollos) began to speak boldly in the synagogue, but when Priscilla and Aquila heard him, they took him and explained to him the way of God more accurately.
In the previous verse we see that Apollos was speaking accurately about what he knew of Jesus, but he only knew the baptism of John.
More carefully …More accurately than he already knew. Instead of abusing the young and brilliant preacher for his ignorance they (particularly Priscilla) gave him the fuller story of the life and work of Jesus and of the apostolic period to fill up the gaps in his knowledge. It is a needed and delicate task, this thing of teaching gifted young ministers. They do not learn it all in schools. More of it comes from contact with men and women rich in grace and in the knowledge of God’s ways. He was not rebaptized, but only received fuller information. RWP
It was great that Apollos went out there speaking faithfully what he had previously learned. In my own (very limited) understanding of the ‘Baptism of John’ is that it was a baptism of repentance and was intended to prepare the way of the Lord and Apollos had knowledge of some of Christ’s teachings. Repentance is an essential response of those coming to Christ. Perhaps what was missing was information on Christ crucified for sinners and the call of salvation by grace alone through faith alone.
It is good to be bold and passionate, but perhaps Paul’s reference to the the Jews forsaking of the gospel coud have some implications for us.
Rom 10:1-3 ESV. Brothers, my heart’s desire and prayer to God for them is that they may be saved. I bear them witness that they have a zeal for God, but not according to knowledge. For, being ignorant of the righteousness that comes from God, and seeking to establish their own, they did not submit to God’s righteousness.
Of course they were very smart people, but they didn’t understand and accept the free gift of the gospel.
In conclusion – It is important to be bold and passionate in share our faith but lets always be sure we are being faithful to the message of salvation. I have said in recent posts that “God can use our most clunky efforts at evangelism”. I believe that this is true, but lets not rest being clunky when there is a chance to learn and grow in faithfully responding with the gospel to a range of people and philosophical/religious backgrounds. We need to know where someone is coming from and the jargon they might be familiar with and what it might mean.
Probably one of the best resources for getting on the ball with sharing the gospel is The School of Biblical Evangelism by Ray Comfort and Kirk Cameron.