It is possible to become discouraged about the injustice we see everywhere. But God did not promise us that the world would be humane and just. He gives us the gift of life and allows us to choose the way we will use our limited time on earth. It is an awesome opportunity.
My mom started smoking when she was 11. She went to the hill next door to try her first cigarette. She set the entire hill on fire but it didn't deter her.