"A new command I give you: Love one another. As I have loved you, so you must love one another. By this all men will know that you are my disciples, if you love one another." (John 13:34)
"Let no debt remain outstanding, except the continuing debt to love one another, for he who loves his fellowman has fulfilled the law. The commandments, "Do not commit adultery," "Do not murder," "Do not steal," "Do not covet,"and whatever other commandment there may be, are summed up in this one rule: "Love your neighbor as yourself. "Love does no harm to its neighbor. Therefore love is the fulfillment of the law. (Rom 13:8)
Jesus said "If you love Me you will keep my commandments" (John 14:15). (A good summary of love is 1 Cor 13:1-13) This cannot be overlooked. Grace is never an excuse to sin. That is why this book really useful. It helps show the line between grace and truth. Jesus didn't come to Jerusalem and preach only grace. If it were that simple, He wouldn't have condemned the scribes and Pharisees. They had no love in them. We are still commanded to love:
You, my brothers, were called to be free. But do not use your freedom to indulge the sinful nature; rather, serve one another in love. (Gal 5:13)
This book gives various circumstances were people (some christians and some non-christians) have needed to be reached in gentleness and love. Sometimes this is explaining the Truth about the law, so that grace can be preached:
What shall we say, then? Is the law sin? Certainly not! Indeed I would not have known what sin was except through the law. (Romans 7:7)
Do we, then, nullify the law by this faith? Not at all! Rather, we uphold the law. (Romans 3)
The law does not save us. We are saved by the Grace of God and not by works, but this fact does not negate Christian responsibility.
Again, this is a fine line that has been well thought out and covered in various ways by the author Randy Alcorn. I think this book should be a must read for every Christian. I only wish it were a bit longer. But I do like it as it is, (since you can read it in an afternoon if you want) it makes a great gift to pass around to fellow Christians and non-Christians alike.