Given that the symbolism practially beats you about the head and shoulders in The Lion, the Witch, and the Wardrobe this is an almost amazing statement.
Edmund, the sinner whose life is forfeit to evil is redeemed by Aslan, the son of the Emperor-Over-The-Sea who made Narnia. Aslan, though without sin himself, willingly sacrifices himself to redeem Edmund, and is abused, humilated, and ritualistically killed on the stone table. He conquers death, breaks the stone table, and returns, to be found by two women, and then frees those bound by evil, and defeats the devil incarnate.
You cannot really get more obvious without inserting "mankind" for "Edmund", "Jesus" for "Aslan", "cross" for "stone table", and "Satan" for "White Witch".