Posted at Reformation Scotland:
Could there be any question more important? But you don’t hear a lot of people asking it these days. Some people think it’s unhelpful, unsettling and unnecessary to ask such a question. But if we are wrong on the matter of greatest personal concern to us – wouldn’t we want to know? Sometimes people think it’s just a case of believing the gospel and seek to convince struggling souls to do this. But you can believe these things to be true and still not be assured they apply to you. Perhaps we are also functioning at a low level of assurance. The truth is that we cannot expect to have high levels of assurance while we have low levels of obedience. The more we find the evidences of faith working by love in our lives and hearts, the more assurance we can enjoy.
One book in particular has been of supreme help in this area: William Guthrie’s The Christian’s Great Interest. The subject of the book is assurance of salvation and it seeks to give various tests by which someone may know that he is a Christian and in doing so also sets out very clearly the way of salvation.
“Great Interest” doesn’t just mean that the book deals with the matter of greatest importance to a Christian and his chief concern. It is a legal term and means to have a valid stake or share in something to our benefit. Guthrie’s book deals with how the Christian may know whether he has a valid legal claim. The claim that matters is one within the Will and Testament or Covenant that the Lord Jesus Christ graciously makes with His people. Guthrie helps us to put ourselves in a courtroom trial where we are under Scripture as a judge to determine if our claim is true.