Looking at the Letter to the Hebrews again.

The writer is apprehensive that some of his readers may have become indifferent to their Christian faith. This peril of indifference would grow more and more serious as time went on and Jesus delayed His return in glory to save those who were eagerly expecting Him. Therefore the author was moved to write these Christians this stirring epistle. The cold and indifferent among them must be startled our of their torpor and neglect and be roused to a new consciousness of the transcendent worth of that which they possessed. The epistle is, in the truest sense, an impassioned oration centered in recalling to unshakable devotion to Christ weary and wavering disciples, to a steadfast faith which would triumph over all trials, temptations, impending persecution and death. Some of these readers had become dull of hearing the Word, they had ears to hear but did not hear (5: 11) ; they were neglecting corporate worship (10: 25); and they were in great danger of apostasy. “Take care, brethren, lest there be in any of you an evil, unbelieving heart, leading you to fall away from the living God. But exhort one another every day as long as it is called today” (3: 12,13). Paul Bretscher “Faith Triumphant”.