When Adam and Eve rebelled against God, sin and death entered the world. As a result, we are all born into sin, and we all suffer. According to Peter Kreeft, this connection is necessary and natural. The alienation from God and from the rest of the world that results from sin necessarily leads to suffering. We aren’t living in the state of free and open fellowship with God that we were created for. Something is fundamentally wrong with our lives. This is why we suffer.