I too have been profoundly affected and blessed by John Piper - but you all should be aware that John Piper does not hold to the classic Reformed Position of "Perseverence of The Saints" as laid out in the Canons of Dort and The Westminster Confession of Faith.
You can access Piper's explanation for each of the five points of TULIP on his website:
www.desiringgod.org. Here is a brief comparison for you of some of the disparity between a few of Piper's views and the Canons of Dort on the final point of "P." The views of Piper are taken from his church's article called "What We Believe About the Five Points of Calvinism."
Piper Says: "But we mean more than this by the doctrine of the perseverance of the saints. We mean that the saints will and must persevere in the obedience which comes from faith. Election is unconditional, but glorification is not.
There are many warnings in Scripture that those who do not hold fast to Christ can be lost in the end"
Article 3 from CoD: "Because of these remnants of indwelling sin and also because of the temptations of the world and of Satan, those who have been converted could not remain standing in that grace if left to their own strength. But God is faithful, who mercifully confirms them in the grace once conferred upon them and powerfully preserves them in that grace to the end."
Piper Says: "The way we put together these crucial threads of Biblical truth is by saying that we are indeed justified on the basis of our first act of faith
but not without reference to all the subsequent acts of faith which give rise to the obedience that God demands."
Article 8 from CoD: "So it is not through their own merits or strength but through the undeserved mercy of God that they neither totally fall away from faith and grace nor remain in their downfall and are finally lost. With respect to themselves this could not only easily happen but would undoubtedly happen. But
with respect to God this cannot possibly happen, since His counsel cannot be changed, His promise cannot fail, the calling according to His purpose cannot be revoked, the merit, intercession, and preservation of Christ cannot be nullified, and the sealing of the Holy Spirit can neither be frustrated nor destroyed."
Piper Says: "We are not left to ourselves and our assurance is
very largely rooted in the sovereign love of God to perform that which he has called us to do."
Error 2 and refutation under the Fifth Head of Doctrine from the CoD: The Error of thought: "God does indeed provide the believer with sufficient strength to persevere, and is ready to preserve this in him
if he will do his duty. But even with all those things in place which are necessary to persevere in faith and which God will use to preserve faith,
it still always depends on the decision of man's will whether he will persevere or not."
The Refutation: "This idea contains outright Pelagianism. While it wants to make men free, it makes them robbers of God's honour. It conflicts with the consistent teaching of the gospel, which takes from man all cause for boasting, and ascribes all the praise for this benefit to the grace of God alone. It is also contrary to the testimony of the apostle: It is God
who will sustain you to the end, guiltless in the day of our Lord Jesus Christ, 1 Cor 1:8."
This has been just a brief snapshot of some of the discrepencies I've found under this doctrine as laid out by Pastor Piper's church. I strongly recommend reading the entire article under the sub-heading of "Perseverence of the Saints" and then read the entire Fifth Head of Doctrine from the Canons of Dort along with all of the listing of errors and refutations that are spelled out in detail there. You will see many more discrepencies.
The first clue that there are some problems there can be seen within the title of the article itself - "
What We Believe About the Five Points of Calvinism." In my opinion the Canons of Dort are clearly set forth and are in need of no interpretation. Bethlehem Baptist apparantly needs to clarify their position on TULIP since its view runs contrary to the historic Reformed View of "Perseverence."
Now - I am not saying that John Piper is a heretic by any means. But I would not consider him a true Reformer and vehemently disagree with his church's position on "Perseverence of The Saints."