These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life. This is the confidence which we have before Him, that, if we ask anything according to His will, He hears us. And if we know that He hears us in whatever we ask, we know that we have the requests which we have asked from Him (1 John 5:13-15).
Do not let your hearts be troubled. You believe in God; believe in Me as well. In My Father’s house are many rooms. If it were not so, would I have told you that I am going there to prepare a place for you? And if I go and prepare a place for you, I will come back and welcome you into My presence, so that you also may be where I am. You know the way to the place where I am going.” (Jn. 14:1-4)
Do not be deceived, God is not mocked; for whatever a man sows, this he will also reap. For the one who sows to his own flesh will from the flesh reap corruption, but the one who sows to the Spirit will from the Spirit reap eternal life. Let us not lose heart in doing good, for in due time we will reap if we do not grow weary. So then, while we have opportunity, let us do good to all people... (Galatians 6:7:10).
And God will wipe away every tear from their eyes; there shall be no more death, nor sorrow, nor crying. There shall be no more pain, for the former things have passed away (Revelation 21:4).
Do not be afraid of those who kill the body but cannot kill the soul. Rather, be afraid of the One who can destroy both soul and body in hell (Matthew 10:28).
The Bible calls Satan by many different names. In John 10:10; it says that he comes to Kill, Steal and Destroy. (Who - You!)
Salvation is found in no one else, for there is no other name under heaven given to mankind by which we must be saved." Acts 4:12
A "Preventer" is to keep people from going to Hell.