I have been redeemed from the law of sin and disease by the finished work that Yeshua did on the cross. That my friend is grace. Yeshua did not only become sin on the cross, He carried our pain and bore our sickness. You can choose to receive your healing just as you received your salvation.
You want to shake the gates of hell? Then begin to declare that I am saved by the blood of Christ and I am the healed of the Lord. Yeshua said… it is finished! (tetelestai, from the Greek - paid in full). If you can believe!