And since there are other Christian teachers/ministries I can learn from (e.g., John MacArthur/Grace to You, Alistair Begg/Truth for Life, R.C. I've found the teachings from John Piper and 'Desiring God' (after testing it with God's word) requires more discernment than I currently possess.

With that said, it would be unwise for me personally, to continue to follow John Piper or his 'Desiring God' ministry as he/they continue to engage and condone unbiblical practices. I know I can be easily deceived just like Eve, and desire all that feeds my flesh and makes it feel good through emotional and sentimental hogwash. I share all this to show you how much Piper and his ministry 'Desiring God' has, in some ways (not all), been led away from sola scriptura (Scripture alone), so that you might be more discerning about following their ministry (writings, sermons, etc.). Then at Passion 2012, Pastor John Piper condoned and participated in Louie Giglio's practice of a meditative, mystical type exercise that closely mirrors the heretical 'Lectio Divina' where Catholic priests believe that God directly speaks extra-biblical messages to those who engage in this mind-emptying practice (click link to listen to Todd Friel's 'Wretched' radio program on this topic).

Unfortunately, Piper's lack of obedience to God's word in 1 Corinthians 15:33 'Do not be deceived: 'Bad company ruins good morals.'' continued to perpetuate his decline in discernment as he extended an invitation to Rick Warren (2010) and Louie Giglio (2011) to be speakers at his Desiring God National Conferences as well. Though Piper was questioned and criticized (and by some, too harshly and unbiblically), he stood by his young protégé and extended two more invitations to speak at their national conference (20), though Driscoll proved to continue to get carried away by strange and unbiblical behavior like having pornographic divinations about other people's lives, and speaking harshly, including name calling to rebuke those within his church. But in 2006, there was an uproar within the Christian community after John Piper extended an invitation to a young, filthy mouthed, unabashed preacher from Washington state, Mark Driscoll, to be one of the speakers at his Desiring God National Conference.

Desiring god look at the book