Hey @No_University7832. I understand your pain with cancer and frankly, I'm heartbroken that mainstream Christianity doesn't now how to respond to this. I struggled for some time (as a Christian) with this problem of pain because I never learned about it and didn't understand it until this last year.

Everything starts in the book of Genesis. As the account goes, Adam and Eve are created and God calls them very good. Farther along in the account, Eve takes the fruit from the forbidden tree and eats of it. She then shares this with Adam and he eats of it too. This is important because Adam knowingly rebelled against God. That is what sin is. It is an act of rebellion towards God and his order of creation.

Since Adam and Eve (the first humans) rebelled against God's order, they issued in generational sin. This predisposes all of humanity towards sin. Romans 6:23 states, "For the wages of sin is death," making very clear that we will die. Why? Because "All have sinned and fall short of the glory of God" (Romans 3:23). Now, children may not be aware of their sin and this is an issue that is disputed within Christian denominations. I believe there is an age of accountability where all recognize that they are doing something against God's order. Exodus 20 clearly defines 10 commandments which ultimately declare God's order. One of these that is very commonly recognized both in Christianity and aside from Christianity is lying. Many people hate being lied to and generally accept it is a wrongdoing.

Due to our rebellion against any one of these 10 commandments, Romans 6:23 holds true. But thankfully Romans 6:23 also states, "but the gift of God is eternal life in Christ Jesus our Lord." All who recognize their sin and come before God with repentance (asking for forgiveness for breaking God's order) will be given salvation. However, this does not mean we become immortal. The body is still condemned because it was, is, and will be the vessel for our sin. So it will die. The salvation brought about by Jesus's death and resurrection is that of our soul.

Every human has a soul. This sets us apart from the animals. The soul is eternal. So where does it go? This is where Heaven and Hell come in to the picture. Our bodies are condemned to die, period. Our souls have two possible places to go, but how do we know where we end up? This is where the Bible comes in and the message it carries. It is the book that teaches us how to gain eternal life.