Blood has a strange power. First, it cleanses the body of impurities, draws away the pus from injured tissues and restores them. Second, it even has the power of rebuilding tissues that have been destroyed. It builds not only skin and flesh, but, as in the case of the fingernail, it has the mysterious power of reproducing structure and form and well. Third, the blood has the power of controlling the development of any part of the body, a power which reaches into the future.
And so it is with the soul as it is with the body. The blood of Christ not only brings redemption from sin but has the power to bring about spiritual development: sanctification. Sanctification is the outflow of an overflowing life within the soul, the "fruit" of the Spirit (Galatians 5:22-23).
Some theological scholars of the nineteenth century did not see spirituality as related to life. They thought of the soul as an abstraction. But the soul does not exist apart from life. The power of the blood means the power of love. If blood can bring recovery to the sores of the body, love has the power to redeem the wounds of personality. If blood has the power to restore broken-down tissues, love can make the wounded personality whole again.
It is the teaching of the New Testament that the sacrificial love of Christ has the power to redeem and reconcile the world. Not that physical blood can redeem the sins of the soul; but to love other people enough to be willing to pour out your blood for them, this is the heart of Christ-like love. Such love has the power to redeem and in this lies the hidden reason why Christ poured out his blood upon the cross for us.
Revelation 1:5 “… Unto him that loved us, and washed us from our sins in his own blood.”