What is the substance of all false religion? It’s got to be something really bad right? Is it violence? Is it hedonism? Is it greed? The great puritan writer John Owens offers his opinion when he writes “Mortification from a self-strength, carried on by ways of self-invention, unto the end of a self-righteousness, is the soul and substance of all false religion in the world.” In other words trying to do good and stop sinning (mortification or the killing of sin) on our own strength is the basis of all false religion in the world. This might not seem apparent at first, but when you think about it, is there a more obvious answer?
By itself, it is good to do good. But if we do good to the exclusion of God, the source of all good, then we in fact do bad, very bad. Why? Because when we do “good” by our own strength, it is not God that gets glorified but ourselves. The less we rely upon God to do good, the more credit that we get. We take the credit, the glory, and the fame, and in our pride we’ve eliminated the need for God. Not only is this bad, but this is pure evil. It is nothing short of idolatry. We’ve replaced the true God with ourselves and in our own effort to do good, we trample upon God’s rightful place as the sovereign creator of the universe.
God says that our righteousness is as filthy rags to him. God doesn’t want our human efforts to become better people. God wants us to find our sustenance in Him. Not because he’d prefer us to be sustained by him rather than another source, but because there is no other source by which we can be sustained! God is the only source, and it is an insult to him to believe or act otherwise. False religions and false teachers claim to know the way or the steps to achieve a better life now and in the hereafter. But the true teacher of the only true religion pointed to himself as the way to an abundant and everlasting life, not by following some rules, but by simply trusting in him who has done what we were not capable of doing alone.