God's message of salvation is for all of mankind, but there are those who seek to keep his message from being heard.  This nefarious work is done in order to keep people in darkness, and spiritual ignorance.  God so loved the world that he gave his only begotten Son that whosoever believes in Him should not perish, but have eternal life.  This message never grow old.  It is God's Word that will never pass away.  Therefore we need to respond to his only message of eternal life in Jesus.