The NASB’s use of “mind” (3820) and the KJV’s use of “heart” demonstrate the different cultural focuses of the two centuries. The Hebrew word is very frequent and has a wide range of translations but all of them circle back to the concept of the inner man. What is the focus of your inner man? The inner man is reflected in what we seek in life and how we set our priorities.
This brings to mind,
(Matthew 6:33 KJV) But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you.To the world this is ridiculous. To the cultural Christian it is put on the back burner. Both of those groups would be joined at the hip as “fools” (3684), not because they are incompetent but because their focus makes it impossible to see the big picture.
So? Only you and God know where your inner focus points. Only you and God can do anything about it. Being a fool is a choice.