What does Christ's one offering do for those who are sanctified?
By His one offering for sins, Christ sat down at God's right hand, and by that single offering He has perfected forever those who are sanctified. This perfection is permanent, not conditioned on human performance, not until they fail, but forever.
Les explains that every priest under Judaism stood daily ministering and offering the same sacrifices, which can never take away sins. But Christ, after He had offered one sacrifice for sins forever, sat down at the right hand of God. By that one offering He hath perfected forever them who are sanctified. Les emphasizes “Forever”—not until we goof it, not until we drop the ball, but forever.
Hebrews 10:14
For by one offering he hath perfected for ever them that are sanctified.