Proverbs 3:7-8
7 Do not be wise in your own eyes; fear the Lord and shun evil.
8 This will bring health to your body and nourishment to your bones.

From this verse there is a possibility that we can become sick when we are wise in our own eyes and continue to do evil. But when we fear the Lord, the scripture promises us that, it will bring health to your body and nourishment to your bones. Obviously, when we fear God, we hate evil and being arrogant.

James 5:14-16 : 14 Is anyone among you sick? Let them call the elders of the church to pray over them and anoint them with oil in the name of the Lord. 15 And the prayer offered in faith will make the sick person well; the Lord will raise them up. If they have sinned, they will be forgiven.

Application

Visit and/or pray with one person who is sick.