My condolences to Rick Warren and his wife in the lost of their son from depression.  In Romans 5:3, it states that the problems that we run into will develop our perseverance, which in turn will strengthen our character, deepen our trust in God and give us greater confidence about the future.   In this difficult time, Rick and his family only need to let the Holy Spirit fill their hearts with love and continue to pursue God's purpose in their lives.