Yes. We are given specific instructions to follow in order to not become sick again.
But legalists and judaizers don't get it. Why don't they? Because they lack faith.
Galatians 3:3 Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?
Mmm... No. If it were as you say and it is up to us to depart from Christ and His Spirit and go back to working at the law in order to "strengthen" our "immune system" SOMEONE would have said it. Some Apostle or the Lord Himself would have said those words.
Paul is talking to Christians here. People who have come to Christ. And then attempted to do what YOU are telling other Christians to do;
Galatians 3:10-12
10 For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that continueth not in all things which are written in the book of the law to do them.
11 But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith.
12 And the law is not of faith: but, The man that doeth them shall live in them.
How come you guys don't understand what this is saying???
If you went to the Author (master Physician) how is it you don't know the Process of being Healed and staying Healed?
If it was by going back to the law Why would there have been so MUCH description on why the LAW has no POWER to heal anyone or to keep anyone from sin?
It is because it is a construct that you have made up in your own imagination from a lack of faith. Right? Look at the weak brother and the strong brother. Its not the strong brother that follows his understanding of the law. Its the weak brother.
Something to think about, maybe.
For this reason Christ is the mediator of a new covenant, that those who are called may receive the promised eternal inheritance—now that he has died as a ransom to set them free from the sins committed under the first covenant. Hebrews 9:15
Israel is the recipient of the first covenant. Are they not recipient of the new covenant?
But God found fault with the people and said: “The time is coming, declares the Lord, when I will make a new covenant with the house of Israel and with the house of Judah. It will not be like the covenant I made with their forefathers when I took them by the hand to lead them out of Egypt, because
THEY DID NOT REMAIN FAITHFUL to my covenant, and I turned away from them, declares the Lord. This is the covenant I will make with the house of Israel after that time, declares the Lord. I will put my laws in their minds and write them on their hearts. I will be their God, and they will be my people. Hebrews 8:8-10
Are we suppose to REMAIN faithful or not?
What will God put in their/our hearts that we should remain faithful to?
Now, what are you boasting about?
If some of the branches have been broken off, and you, though a wild olive shoot, have been grafted in among the others and now share in the nourishing sap from the olive root,
do not boast over those branches. If you do, consider this: You do not support the root, but the root supports you. You will say then, “Branches were broken off so that I could be grafted in.” Granted. But they were broken off because of unbelief, and you stand by faith.
Do not be arrogant, but be afraid. For if God did not spare the natural branches,
he will not spare you either. Consider therefore the kindness and sternness of God: sternness to those who fell, but kindness to you,
provided that you continue in his kindness. Otherwise,
you also will be cut off. Romans 11:17-22
Confess Jesus Christ as your Lord and Savior and Walk in Love.
God is good and His LOVE endures forever.