Hebrews 4:6 - Ellicott's Commentary On The Whole Bible

The substance of the preceding verses may be thus expressed: There is a rest of God, into which some are to enter with God, — a rest not yet entered at the time of the wandering in the wilderness, and therefore not that which followed the work of creation, — a rest from which some were excluded because of unbelief. These five particulars are repeated in substance in the present verse: “Seeing, therefore, it is (still) left that some should enter in, and they to whom formerly glad tidings were declared entered not in because of disobedience, He again,” &c. “Disobedience” — though Hebrews 4:2 speaks of unbelief as the cause: see Note on Hebrews 3:18. In John 3:36, the transition from “believeth” to “obeyeth” is equally striking.