"English Puritans of the Stuart era were divided by a number of questions. The greatest these asked what constitutes salvation and restoration from sin.
All agreed that it was by grace through faith. But few could agree on how to define sin, grace, and faith. Richard Sibbes consciously followed Augustine, Martin Luther, and John Calvin in defining sin as self-love and grace as God's redemptive love in Christ.
His theology centered on the love of God expressed through Christ and offered by the Spirit; and faith as a response to that love.
This produced a winsome and transforming theology of union with Christ and communion with God. In this he was a counterweight to the spread of moralistic Puritan theologies in his day."
Get Ron Frost's perfectly readable PhD on this via Lulu.com R N Frost: Richard Sibbes' God's Spreading Goodness Check the lulu homepage for discount codes (PRICETHAWUK 20% off til Jan 20th) If you've got a few quid to spare then I highly commend Ron's book to you. I've also published two edited volumes by Richard Sibbes, also via Lulu.com