A.W. Tozer emphasizes the uniqueness and finality of Christ's sacrifice, contrasting it with the Catholic practice of the Mass, which he argues erroneously suggests a perpetual sacrifice. He highlights that the New Testament clearly states that Christ's sacrifice was a once-for-all act, which cannot be repeated, as evidenced in Hebrews. Tozer points out that while priests may offer sacrifices daily, they cannot take away sins, whereas Christ's singular offering has perfected believers forever. He asserts that true forgiveness means there is no longer a need for any further sacrifice for sin.