Abraham embodied living by faith. Through perpetually living in a tent, he demonstrated his complete trust and reliance upon God.
Abraham, the father of the faithful, did not have a blind faith; it was based upon observation of God's proven track record of faithfulness.
The name Isaac—'laughter'—suggests his optimistic disposition, someone not afflicted by fear and doubt. Isaac serves as a type of Christ, honoring his father.
John Ritenbaugh characterizes the spiritual condition of the recipients of the Hebrews epistle as dangerously complacent, drifting into apostasy through neglect rather than from any blatant sin or perversion. Losing their zeal and first love after the manner of the Ephesians, having a complacent disregard for Christ's sacrifice, …
God helps us to overcome our problems in an unraveling process, sometimes taking us back through the consequences of the bad habits we have accumulated.