Intimacy with God is the purpose of our lives. It’s why God created us. Not simply to believe in him, though that is a good beginning. Not only to obey him, though that is a higher life still. God created us for intimate fellowship with himself, and in doing so he established the goal of our existence — to know him, love him, and live our lives in an intimate relationship with him. Jesus says that eternal life is to know God (John 17:3). Not just “know about” like you know about the ozone layer or Ulysses S. Grant. He means know as two people know each other, know as Jesus knows the Father — intimately.
— John Eldredge, Walking with God, p. 12