Speaking of what could become support for his readers on their difficult path, the author of the letter especially...
Speaking of what could become support for his readers on their difficult path, the author of the letter especially singles out readiness to support one's brothers, the "saints," that is, Christians (vv. 10-12), and hope in the immutability of the promises once given by God (vv. 13-15). He reminds them that when God swears by Himself, He does so because He cannot swear by anyone else higher than Himself (vv. 16-20). Such a statement seems completely obvious, but as we can see, it was quite relevant in a time when people were ready to doubt everything, including the covenant made with God and the promises He had given. In fact, a certain cooling of spiritual life was, as we can see, largely connected with a loss of trust: many thought that after the catastrophe of 70 all the former covenants had become obsolete, including those God made with His people through Abraham and Moses. The author of the letter insists that God remains faithful to His people, faithful to all covenants and to all promises once given.
But He gives no proofs of His faithfulness except the Messiah-High Priest, who opened to all who seek the way into the Kingdom. After all, God Himself is the highest witness to His own faithfulness, and by definition there can be no other. Strictly speaking, only the Kingdom is proof in this case: unlike Jerusalem and the Temple, it did not collapse, did not disappear, and did not close itself to the faithful. But in order to acquire it, trust is needed, and this requires a definite spiritual effort. If the one seeking an answer did not want to make that effort, if he did not even try to struggle with his distrust, then he could not receive any answer. Thus a closed circle formed, and it could be broken only by throwing oneself toward God the way people throw themselves into the water from a sinking ship: there is nothing to lose, it will not get worse, and what remains is to decide and use the last chance. And if the one seeking salvation truly made that decision, he acquired both trust in God and the Kingdom as the best proof of His faithfulness.