Act 2:37-40
(37) Now when they heard this, they were pricked in their heart, and said unto Peter and the rest of the apostles, Brethren, what shall we do?
(38) And Peter said unto them, Repent ye, and be baptized every one of you in the name of Jesus Christ unto the remission of your sins; and ye shall receive the gift of the Holy Spirit.
(39) For to you is the promise, and to your children, and to all that are afar off, even as many as the Lord our God shall call unto him.
(40) And with many other words he testified, and exhorted them, saying, Save yourselves from this crooked generation.
Observation
37. Peter had given them the truth and told them how they had crucified their Messiah and now they were in grief over what they had done. They now wanted to know what they needed to do to escape the wrath of God.
38. Peter now instructs these people to agree with God that they are sinners and to turn from their sin and then to Christ. They then are to identify themselves with Christ by being baptized. After asking Christ into their lives they would receive the Holy Spirit.
39. This promise of salvation through Christ is offered to all men but they must accept Christ as Savior for themselves.
40. Men need to turn to Christ for salvation and then away from evil and it's influences.
Application
The only way to heaven is through Christ. We must be in the world but we should not allow it to have control over or influence us.