It is quite important how you approach the word of God from the standpoint of the New Testament. The word of God for man today is like a mirror.
If I asked you to look at yourself I believe you will not start to turn your neck trying to look around your body. You will reach out for a mirror just so you have a clearer view of your physical body. If you had a spot on your nose you will still need a mirror in order to locate it. Your physical eyes are limited to the things they can look on your body; but a mirror can give you a broader perspective of your body.
In Hebrews 4: 3 it says, “For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.” The latter part of this scripture shows us how the works are finished. I am referencing this scripture because the new man in Christ does not need to do any works but only look in the mirror to see the work which has been done. This is the principle of the New Testament.
For instance, if the word says in Matthew 8: 17, “That it might be fulfilled which was spoken by Esaias the prophet, saying, Himself took our infirmities, and bare our sicknesses,” then it means you have to see yourself as one who cannot be sick because any sickness or disease you can have was taken away by Christ.
You can be looking at your physical foot swollen up but all you have to do is switch and look into the word of God we just quoted, which is your spiritual mirror revealing your true self and be able to see that your spiritual foot is not swollen but normal. The scripture says in 2 Corinthians 3: 18, “But we all, with open face beholding as in a glass the glory, are changed into the same image from glory to glory, even as by the Spirit of the Lord.” The new man in Christ is called the glory of the Lord. As he keeps looking into the glass or the mirror to see himself, there is a transformation into what he sees in the word.
So the swollen foot will eventually become normal because the new man continues to see with the mind to observe that his true foot is normal.