How does grace relate to salvation? Is it free or costly? What is grace?
In this podcast Dr. Bing discusses the relationship between grace and eternal salvation. He compares and contrasts grace as unmerited favor or unconditional favor given to sinners as opposed to the idea of "costly" grace. As Dr. Bing notes, Grace is not expensive, it's not cheap, it's free.
Additionally Dr. Bing provides a primer on how grace relates to Faith, Repentance, Lordship, Assurance & Security, and our Motivation for Serving.
For more reading be sure to checkout GraceNotes.