Heb 4:1-16. The promise of God’s rest is fully realized through Christ: Let us strive to obtain it by Him, our sympathizing High Priest.
Let us ... fear - not with slavish terror, but godly “fear and trembling” (Phi 2:12). Since so many have fallen, we have cause to fear (Heb 3:17-19).
being left us - still remaining to us after the others have, by neglect, lost it.
his rest - God’s heavenly rest, of which Canaan is the type. “To-day” still continues, during which there is the danger of failing to reach the rest. “To-day,” rightly used, terminates in the rest which, when once obtained, is never lost (Rev 3:12). A foretaste of the rest Is given in the inward rest which the believer’s soul has in Christ.
should seem to come short of it - Greek, “to have come short of it”; should be found, when the great trial of all shall take place [Alford], to have fallen short of attaining the promise. The word “seem” is a mitigating mode of expression, though not lessening the reality. Bengel and Owen take it, Lest there should be any semblance or appearance of falling short.