Hebrews 10:39 But we are not of those who draw back to perdition, but of those who believe to the saving of the soul.
At once it is arresting to note how the author contrasts those who draw back with those who believe. Both actions also have their attendant consequences listed. The ones that draw back do so to their destruction, or perdition. Those who believe, do so to the saving of their souls. It must also be noted that this verse specifically addresses professing believers and the ultimate outcome of their spiritual walk: either the broad road or the narrow one that leads to life.