Proverbs 4:20-22 read, my son, give attention to my words; incline your ear to my sayings. Do not let them depart from your eyes; keep them in the midst of your heart for they are life to those who find them and health to all their flesh. David was speaking the inspired word of God to his son; these were not his words because only God’s words can give life so what he is saying is, that the word of God gives health to all your flesh both internal and external.
When we meditate on the word of God and apply it in our life over sickness and diseases we do not have to worry about side effects from it because it is health to all of our flesh. Now I am certainly not against medicine and doctors; I am a retired nurse myself and I know that man made medicine does have side effects. If one does not have enough faith to believe for his healing then take the medicine; it can still cure the problem but be aware that it can also cause other problems as well.
God has given man knowledge of natural herbs for illness and it works but man has taken knowledge a step further and he has created medicine that works in one way but harms in another; that is why you will see the warning label in the package. The best thing to do is to apply the word of God over the illness. The second best thing to do is to take herbs designed to cure that illness.
Not only is the word of God health to us for sickness and diseases it is also life sustaining in every area of our life. There is knowledge without the Spirit of God but it leads to death or destruction for example, someone might know how to commit a crime and if he does it and gets caught then he would have to pay the price for that crime. It could affect his future, his family, his livelihood and it might even cause death to him; all of this is knowledge without the Spirit of God but there is knowledge with the Spirit of God and this knowledge leads to a fruitful life. God said these words to Joshua in Joshua 1:8 this book of the Law shall not depart from your mouth but you shall meditate in it day and night that you may observe to do according to all that is written in it. For then you will make your way prosperous and then you will have good success. It is obvious that when we observe the word of God and obey what He said then our way will be made prosperous because there is life in it.
God’s word makes us whole in every way; it is health to all those who will seek Him because it is His good pleasure to do good things for us. David said in Psalm 23:1 the Lord is my Shepherd, I shall not want and Paul said in Philippians 4:19 and my God shall supply all your need according to His riches in Christ Jesus. These two scriptures are taken from the Old and the New Testament and both indicate that God will supply all of our needs but He will also give us the desires of our heart according to Psalm 34:7 which read delight yourself also in the Lord and He shall give you the desires of your heart. Therefore, we can apply the word of God over ourselves like a medicine for healing and we can apply it in our life for everything else that we need or want because it is health to all our flesh.