I did another search about Piper. He looks like a salvation by faith and works kind of guy. I am not buying, what he is selling. Im also, not into the New Apostolic Reformation, and the kundalini spirit. Just not into it.
There is a fine line. Piper crosses this line in many of this doctrines. If someone has faith, the works will be there. We know we love Him (Jesus) if we keep his commandments (I.e not practicing unrepentant sin). His spirit wont let us practice sin, and leads us to good works. As Jesus half brother James says, Faith without works is dead