He is the atoning sacrifice for our sins, and not only for ours but also for the sins of the whole world.
NMVAnd he is the Propitiation (sacrifice to pay for sins against God, to satisfy His righteous anger) for our sins: and not for ours only, but also for [the sins of] the whole world.
OJBAnd he is the kapporah for chattoteinu, not for ours only, but also for the kol HaOlam Hazeh.
T4TRemember that Jesus Christ voluntarily sacrificed his own life for us, so that as a result God forgives our sins. Yes, God is able to forgive our sins, but not only ours! He is also able to forgive the sins of people everywhere!