Christ redeemed the entire Creation from death. Salvation is salvation from hell.
Christ's work had the final objective of uniting human nature with divine nature.
The trouble is that before that happened, human nature had fallen, causing death. Well, something that will eventually be destroyed will not be united to something that is eternal. So He had to heal this destroying death.
Once death is destroyed by His own death and resurrection, we are all, literally, imortals in the sense that although we die for this "crude matter", we as persons, somehow survive that partial destruction and will eventually be resurrected.
Now, after resurrection, we will be in the very presence of God, in the fullness of His Glory. We won't be able to pretend to be or pretend to believe we are not what we with deep love and obstinance had chosen to be. His Love will be all around us. Those whose life was a lie, a living hell will no longer be able to hide that. That is hell, and accepting truth in our life as soon as possible is salvation from that.
So we have salvation from hell that is participation in the whole truth. The whole truth includes God, God's real character and nature, and that's what makes it more difficult the more one is away from the Orthodox Church (the visible, manifest, undivided Body of Christ).
But one may have contact with truth in lesser manifestations as true morality, true knowledge, true beauty, true justice and true love of what is true.