John Chrysostom
What does this mean? Is the essence of a person found in the blood? No, this is not the message God intends to convey. Rather, He has chosen to communicate in this manner, using a familiar expression, as if one individual were to tell another, 'I have your blood in my possession,' instead of saying, 'I have the authority to take your life.' Regarding the idea that the human soul is not made up of blood, we can turn to Christ's words: 'Do not be afraid of those who kill the body, but of those who cannot kill the soul' (Matthew 10:28).