Excerpt from www.carm.org - (C) Matthew J. Slick
What is the Gospel?
It is clearly the gospel that saves us. But what exactly is the gospel?
That too is revealed to us in the Bible. It is found in 1 Cor. 15:1-4: "Now, brothers, I want to remind you of the gospel I preached to you, which you received and on which you have taken your stand. By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain. For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures." The gospel is defined as the death, burial, and resurrection of Jesus for our sins. Baptism is not mentioned here.
Paul said that he came to preach the gospel, not to baptize: "I am thankful that I did not baptize any of you except Crispus and Gaius, so no one can say that you were baptized into my name. (Yes, I also baptized the household of Stephanas; beyond that, I don't remember if I baptized anyone else.) For Christ did not send me to baptize, but to preach the gospel..." (1 Cor. 1:14-17). If baptism is necessary for salvation then why did Paul downplay it and even exclude it from the description of what is required for salvation? It is because baptism isn't necessary for salvation.
Additionally, in Acts, Peter was preaching the gospel, people got saved, and then they were baptized. Acts 10:44-46 says, "While Peter was still speaking these words, the Holy Spirit came on all who heard the message. The circumcised believers who had come with Peter were astonished that the gift of the Holy Spirit had been poured out even on the Gentiles. For they heard them speaking in tongues and praising God. Then Peter said, ‘Can anyone keep these people from being baptized with water? They have received the Holy Spirit just as we have.' So he ordered that they be baptized in the name of Jesus Christ. Then they asked Peter to stay with them for a few days" (NIV).
These people were saved. The gift of the Holy Spirit was on the Gentiles and they were speaking in tongues. This is significant because tongues is a gift given to believers, see 1 Cor. 14:1-5. Also, unbelievers don't praise God. They can't because praise to the true God is a deep spiritual matter that is foreign to the unsaved (1 Cor. 2:14). Therefore, the ones in Acts 10 who are speaking in tongues and praising God are definitely saved and they are saved before they are baptized. This simply isn't an exception. It is a reality.