"A wise person is hungry for knowledge, while the fool feeds on trash. (Proverbs 15:14, NLT") .
There is a second kind of food that the mind feeds on and that is knowledge. What bread and meat and water is to the physical body is what knowledge is to the mind or soul. Without food our physical body dies or at best becomes less immune to diseases. The same thing happens with our mind. Without being fed with knowledge, our mind dies or worse still suffers from low immunity to corruption, destruction and deceit.
The Bible says, "My people perish for lack of knowledge..."(Hosea 4:6). Knowledge is essential to our survival especially since our position and destination in life is not controlled by our physical health but by our mind health.
No matter what you do, feed your mind. Feed it with the right knowledge. Learn new things everyday. Learn new skill every year. Learn God's word and let it dominate and control your thoughts. The Bible says "man shall not live by bread (physical food) bit by every word (knowledge) that proceeds from the mouth of the Lord" (Deut 8:3, emphasis mine)
What are you feeling your mind? Are you feeding on the right knowledge? Knowledge is food. If you eat the right food you will live a healthy life .