We have all experienced it: that moment when Satan whispers in your ear, “You aren’t really a true Christian or you wouldn’t think or behave like that.” It is one of our enemy’s most effective tactics to spread uncertainty and render God’s people ineffective with self-doubt.

But how do we know we are a Christian? Roberts writes, “to be in a gracious state is true happiness. But to know ourselves to be in such a state is true happiness doubled upon us.” Roberts book will lend some help to Christians to discern their spiritual state and make your election and calling sure (2 Pet 1:10).