"Likewise today, some Christians are content to merely exist until they die. They don't want to risk anything, to believe God, to grow or mature. They refuse to believe his Word, and have become hardened in their unbelief. Now they're living just to die"

This quote by David Wilkerson talks to the problem of complacency among some Christians. He is saying that some Christians are content to merely exist up until they die, without taking any risks or growing in their faith. They have actually become hardened in their unbelief and are not happy to believe God's Word. This complacency has caused them to live a life of simply existing until they die, instead of living a life of function and faith. Wilkerson is encouraging Christians to take threats, to believe God, and to grow and develop in their faith. He is advising us that life is too brief to simply exist until we die, which we need to be living a life of function and faith.