3 for every chief priest to offer both gifts and sacrifices is appointed, whence 'it is' necessary for this one to have also something that he may offer; 4 for if, indeed, he were upon earth, he would not be a priest—(there being the priests who are offering according to the law, the gifts, 5 who unto an example and shadow do serve of the heavenly things, as Moses hath been divinely warned, being about to construct the tabernacle, for 'See (saith He) thou mayest make all things according to the pattern that was shewn to thee in the mount;')—
6 and now he hath obtained a more excellent service, how much also of a better covenant is he mediator, which on better promises hath been sanctioned,
Matthew Henry's Commentary on Hebrews 8:3-6
Commentary on Hebrews 8:1-6
(Read Hebrews 8:1-6)
The substance, or summary, of what had been declared was, that Christians had such a High Priest as they needed. He took upon himself human nature, appeared on earth, and there gave himself as a sacrifice to God for the sins of his people. We must not dare to approach God, or to present any thing to him, but in and through Christ, depending upon his merits and mediation; for we are accepted only in the Beloved. In all obedience and worship, we should keep close to God's word, which is the only and perfect standard. Christ is the substance and end of the law of righteousness. But the covenant here referred to, was that made with Israel as a nation, securing temporal benefits to them. The promises of all spiritual blessings, and of eternal life, revealed in the gospel, and made sure through Christ, are of infinitely greater value. Let us bless God that we have a High Priest that suits our helpless condition.