What shall we do?

Now when they heard this, they were cut to the heart, and said to Peter and the rest of the apostles, “Men and brethren, what shall we do?”

Then Peter said to them, “Repent, and let every one of you be baptized in the name of Jesus Christ for the remission of sins; and you shall receive the gift of the Holy Spirit. For the promise is to you and to your children, and to all who are afar off, as many as the Lord our God will call.” (Acts 2:37-39)

What shall we do? Those who listened to Peter's words -- that Jesus Christ had been killed and rose again, that His spirit, the spirit of the Living God, is dwelling in those who believe -- recognize they have a choice to make. Now that they've heard the Gospel, they could accept it or deny it. So they asked perhaps the most logical question that can be asked upon being confronted with the Truth: now what? What shall we do? 

Peter's response must have seemed, for those who heeded his words, too good to be true. That's it? It sounds so easy! Repent and be baptized and voila... we're right with God? Without even sacrificing a lamb or a young goat?

Now, we know, as did those who heard Peter's words, that repentance isn't as easy as it sounds. It's a daily -- even an hourly -- decision. But even then, as Peter tells them (and us), we don't need to rely on our own strength. Repent and be baptized, he says, and we will receive the gift of the Holy Spirit. What a promise! Through Christ we can not only be forgiven our sins, but have the strength, in His power, to resist temptation!

That's the Gospel in a nutshell. And now the question remains: What shall we do with it?