Bhagavad Gita 2.62–2.63
Dwelling on objects, attachment is born; from attachment, desire; from desire, anger. From anger, delusion; from delusion, loss of memory; from loss of memory, ruin of understanding; from ruin of understanding, one falls.
ध्यायतो विषयान्पुंसः सङ्गस्तेषूपजायते ।
सङ्गात्सञ्जायते कामः कामात्क्रोधोऽभिजायते ॥
क्रोधाद्भवति सम्मोहः सम्मोहात्स्मृतिविभ्रमः ।
स्मृतिभ्रंशाद् बुद्धिनाशो बुद्धिनाशात्प्रणश्यति ॥
dhyayato visayan pumsah sangas tesupajayate | sangat sanjayate kamah kamat krodho 'bhijayate || krodhad bhavati sammohah sammohat smrti-vibhramah | smrti-bhramsad buddhi-naso buddhi-nasat pranasyati ||
Dwelling on objects, attachment is born; from attachment, desire; from desire, anger. From anger, delusion; from delusion, loss of memory; from loss of memory, ruin of understanding; from ruin of understanding, one falls.
This is the cognitive triangle in an older ladder. Use it as a map of how a thought becomes a week. It is not a ban on feeling.