From the human perspective.From our side of things, grace, forgiveness, salvation, whichever you prefer to call it, isn't cheap. It's free. And as local home electronics and home furnishings mogul Tom Peterson likes to say, "Free is a very good price." We can't earn it. We can't buy it. It's impossible. We can't even do anything to keep it or lose it. God's laws were never intended to save mankind or provide a way to heaven. They cannot purify mankind of his sin. The issue isn't what we have done but what we are. It's one of nature. We don't sin and become a sinner, we sin because we are sinner. So God's grace isn't cheap, it's free.
From God's side of things, grace, forgiveness, salvation, whichever you prefer to call it, isn't cheap. Its cost is beyond our capability to comprehend. It cost God His Son. From the moment Jesus was crucified and resurrected, He was fundamentally different from what He was before.Jesus went through life on this Earth, was falsely accused, was murdered, physically died, took on the sin of all mankind (2 Cor. 5:21) and became sin for us, then was resurrected. Jesus still has a resurrected, glorified body that, while it is far superior to the bodies we have now, is different from what He was before.
For us, God's grace isn't cheap. It's free. For God, His grace isn't cheap. It cost everything.Cheap grace? Whatever.