Hebrews 13:8

Yesterday, and to-day, and the same for ever. That is, Christ is the same merciful and powerful advocate and protector, in regard of all that serve him faithfully to the end of the world. (Witham)

2. The reason of the duty: As being yourselves in the body; not only in the body natural, and so liable to the like sufferings, and you should sympathize with them now that others may sympathize with you when your time of trial comes; but in the same mystical body, under the same head, and if one member suffer all the rest suffer with it, 1 Cor 12 26. It would be unnatural in Christians not to bear each other's burdens.

Verses 7-15 The instructions and examples of ministers, who honourably and comfortably closed their testimony, should be particularly remembered by survivors. And though their ministers were some dead, others dying, yet the great Head and High Priest of the church, the Bishop of their souls, ever lives, and is ever the same. Christ is the same in the Old Testament day. as in the gospel day, and will be so to his people for ever, equally merciful, powerful, and all-sufficient. Still he fills the hungry, encourages the trembling, and welcomes repenting sinners: still he rejects the proud and self-righteous, abhors mere profession, and teaches all whom he saves, to love righteousness, and to hate iniquity. Believers should seek to have their hearts established in simple dependence on free grace, by the Holy Spirit, which would comfort their hearts, and render them proof against delusion. Christ is both our Altar and our Sacrifice; he sanctifies the gift. The Lord's supper is the feast of the gospel passover. Having showed that keeping to the Levitical law would, according to its own rules, keep men from the Christian altar, the apostle adds, Let us go forth therefore unto him without the camp; go forth from the ceremonial law, from sin, from the world, and from ourselves. Living by faith in Christ, set apart to God through his blood, let us willingly separate from this evil world. Sin, sinners, nor death, will not suffer us to continue long here; therefore let us go forth now by faith and seek in Christ the rest and peace which this world cannot afford us. Let us bring our sacrifices to this altar, and to this our High Priest, and offer them up by him. The sacrifice of praise to God, we should offer always. In this are worship and prayer, as well as thanksgiving.