Christianity is not merely an array of glorious ideas. It is the life-changing experience of the Holy Spirit through faith in Jesus Christ.
If you want more resources about the Holy Spirit, visit http://www.desiringgod.org/topics/the-holy-spirit
If you want to see more sermons by John Piper, visit http://www.desiringgod.org/messages
If you want to read the message, visit http://www.desiringgod.org/messages/how-to-receive-the-gift-of-the-holy-spirit