Premanand Maharaj Ji
Why does my mind have restless or bad feelings, and what shapes them?
Your food shapes your feelings
The mind does not move by itself; its movement follows the three gunas (qualities of nature: sattva, rajas, tamas), and these follow the food you eat. The feelings that arise in the mind follow the gunas, not themselves.
The mind's movement follows the three gunas; it does not move by itself, it moves according to the three gunas.