Premanand Maharaj Ji
Why do bad feelings and restless thoughts keep rising in my mind, and what shapes them?
Food shapes the feelings of the mind
Feelings do not arise on their own; they arise according to the three gunas (qualities of nature: sattva, rajas, tamas). As is your food, so the mind becomes.
The mind's movement follows the three gunas; it does not move by itself. It follows the three gunas according to your food: as you eat, so your mind becomes.