Nietzsche saw God as just another vestige of the pre-scientific past that man would soon outgrow. Those that still cling to God lack the courage to face the world without Him. The authors feel that religious beliefs and behavior are good for us and our survival. Not only does religion lead to physical benefits, but also superior mental health to the surprise of modern psychiatrists. Research shows that religious beliefs can improve mental and emotional health.
Religious people are less likely to suffer from depression and anxiety.
Religious communities foster strong social support networks, and frown on risky indulgences like promiscuous sex, and drugs. Prayer and meditation have health benefits. The strongest point of religion is its power to alleviate existential stress. A higher power is in control that can help you. Religion gives purpose and meaning to our lives.