It seems to me that the issue of giving an altar call falls under the category of method and not message. To be sure, the message must never be compromised while giving such a call! To say that because a practice is not found in Scripture makes it un-Scriptural is not entirely accurate, as our friends who have mentioned pianos and air conditions have noted. By the way, Sunday Schools aren’t necessarily in there either, and yet it has proven to be a great method of teaching God’s Word.
Is it a stretch to find the principle of the altar call in the Bible? Obviously, such a label is nowhere to be found; however, the principle is, if in giving the call we are calling people to come to Christ. Scripture is full of Christ giving invitations for people to come to him. “Come to me, all who labor and are heavy laden, and I will give you rest.” (Mt. 11:28). “Let the little children come to me…” (Mt. 19:14). “Let the one who is thirsty come…” (Rev. 22:17). Consider the passage in Luke 14:15-35. Jesus told a parable about a king who had prepared a banquet and those he had invited gave excuses as to why they could not attend. He then tells his servants, “Go out to the highways and hedges and compel people to come in, that my house may be filled” (italics mine). In other words, do whatever is necessary to get people to come to my banquet.
Is this not the same concept of what is known as an altar call? But it may be said that coming down the aisle does not save a person, and that is absolutely correct! I would find it hard to believe that any Pastor worth his weight in mustard seed would think otherwise. To the contrary, it is a method of inviting folks to come to Christ. Now, back to the passage in Luke—in verses 25-35, after heralding his invitation in seed-scattering fashion, Jesus defines what coming to him is all about: forsaking everything (even family) in order to follow him. “Count the cost,” he says, and if the cross is too heavy to bear set it down and walk away.
So then, the altar call should be seen only as a method of calling people to come to Christ. It is not the only method and it is certainly not something that must be done. But countless Christians have started their journey by stepping out in faith in response to an altar call. Is it Scriptural? Not necessarily, but neither is it un-Scriptural. Remember, it is a method, not a message that competes with the Gospel of Christ, in whom alone salvation is found. I hope that I have at least opened up a perspective that is biblical in nature, but if we cannot agree in this, let us always agree in the saving grace of our Lord and Savior Jesus Christ, to him be all glory and honor!