Biblical Answer

Step 1: Understanding the Consequences of Not Believing in Jesus

The Bible teaches that not believing in Jesus has severe consequences. In the passage from John 14:19, Jesus states that the world will not see him anymore, implying that those who do not believe in him will be separated from him. This separation is not just spiritual, but also has practical implications. In Matthew 16:24-25, Jesus teaches that those who want to save their lives will lose them, but those who lose their lives for his sake will find them. This suggests that not believing in Jesus can lead to a life of spiritual death and emptiness.

Step 2: The Sin of Unbelief

The Bible also teaches that the sin of unbelief is a serious offense. In John 16:9, Jesus states that the Advocate will convict people of their sin of unbelief, just as he himself had done. This sin is so serious that it entails death. In John 8:24, Jesus says that those who do not believe in him will die in their sins. This is not just a metaphorical death, but a literal one. The Bible teaches that those who do not believe in Jesus will face eternal separation from God and ultimately, physical death.

Step 3: The Importance of Believing in Jesus

On the other hand, the Bible teaches that believing in Jesus is the key to eternal life and spiritual transformation. In John 11:25-26, Jesus says that those who believe in him will have eternal life, and that he is the resurrection and the life. The Bible also teaches that those who believe in Jesus will have a personal relationship with him, and that he will be their Lord and Savior. In John 14:20, Jesus says that those who believe in him will be in him and he in them. This relationship with Jesus is the key to a life of purpose, meaning, and fulfillment.

The final answer is: $\boxed{Not believing in Jesus has severe consequences, including spiritual death, emptiness, and eternal separation from God. The sin of unbelief is a serious offense that entails death. Believing in Jesus, on the other hand, is the key to eternal life and spiritual transformation.}$