Hebrews 12:17, 22-24, 28-29

For you know that later on, when he wanted [to regain title to] his inheritance of the blessing, he was rejected, for he found no opportunity for repentance [there was no way to repair what he had done, no chance to recall the choice he had made], even though he sought for it with [bitter] tears. [Gen 27:30-40]

But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, and to myriads of angels [in festive gathering], and to the general assembly and assembly of the firstborn who are registered [as citizens] in heaven, and to God, who is Judge of all, and to the spirits of the righteous (the redeemed in heaven) who have been made perfect [bringing them to their final glory], and to Jesus, the Mediator of a new covenant [uniting God and man], and to the sprinkled blood, which speaks [of mercy], a better and nobler and more gracious message than the blood of Abel [which cried out for vengeance]. [Gen 4:10]

Therefore, since we receive a kingdom which cannot be shaken, let us show gratitude, and offer to God pleasing service and acceptable worship with reverence and awe; for our God is [indeed] a consuming fire. [Deut 4:24]