There are two summary scriptures that establish the "conditions" of salvation. The first is found in Romans 10:13: "For whosoever shall call upon the name of the Lord shall be saved." The second is in Romans 10:9-10: "That if thou shalt confess with thy mouth the Lord Jesus, and shall believe in thine heart that God hath raised him from the dead, thou shalt be saved. For with the heart man believeth unto righteousness, and with the mouth confession is made unto salvation." We can see from scripture the essence of the simplicity that is in Christ Jesus. First, we have to call upon Him. He is not going to force us, or make us accept Him. He is there, waiting on us to make up our minds, and accept Him willingly. Rev. 3:20, Jesus says "Behold, I stand at the door and knock: if any man hears my voice, AND OPENS THE DOOR, I WILL COME INTO HIM...". Secondly, we must believe that God raised Jesus from the dead. There is a lot more to this than just saying "yeah, yeah" in our minds. When we believe in our hearts, we are acknowledging that God is, that He is the greatest power that exists, that He and He alone has the power to leave us dead or to raise us up to live forever, and that His act of raising Jesus up was a sign to us of His acceptance of Jesus' sacrifice on our behalf. Lastly, we see that we must confess, or openly speak, that Jesus is our Lord. There is no such thing as a "secret" disciple. Either Jesus is Lord, or He isn't, and He can't be the Lord of your life if you don't tell anyone. Jesus said, in Matt. 10:32, "whosoever therefore shall confess me before men, him will I confess also before my Father which is in heaven, and whosoever denieth me before men, him will I also deny before my Father which is in heaven".
I would like to insert here something that I have increasingly been seeing in many churches. At the end of a sermon, the preacher gives an invitation.....so far, so good. He points out the status of sinners, and the necessity of believing in, and relying on Jesus Christ. At this point, many of the preachers then tell the listeners that it is NOT necessary to walk the aisle, or to say anything out loud.....ONLY to believe, and confess silently. I can understand that in this "post-modern" world of enlightenment and social (political) correctness, there is a movement afoot that goes out of the way to make sure no one is embarrassed, or brought to the attention of others.....but THIS IS WRONG! Read again what Jesus said....read again what Paul said....CONFESSION before men is an ABSOLUTE necessity to salvation. Confession is made WITH THE MOUTH, and that means making a sound...not silently paying "lip service" to the requirements.
Summarized then, the ONLY conditions to salvation are: BELIEVE, INVITE, AND CONFESS.
As we look at these conditions, we can see also from the earliest of times that these
are the only conditions that have ever applied. As Paul put it in Ephesians 2:8-9,
"For by grace (unmerited gift or favor) are you saved through faith (believing): and
that not of yourselves: it is the gift of God: not of works, lest any man should boast".
We do not, and cannot work for our salvation. It is given to us who believe. And even
that act of believing is something given to us by God. The ability to recognize His
truth is revealed to us through His Holy Spirit. Having once recognized this, we then
know the truth, and believe.