It is of course possible to lead a decent life without believing in Jesus – thank God for that! But we believe that our sense of right and wrong, our sense of justice and our love for other people come from God. These may have evolved along with our species (for example close-knit communities have a better chance of survival), but they still come from God. And only by responding to God’s call, and with His help, can we become the best people we can be. On the other hand, if we consciously turn our backs to God, we are left with our limited and selfish selves. Unfortunately, this is exactly what is often happening, because so much of our world has turned its back to God and is as a result materialistic and selfish.