Krishna now maps the staircase of inner downfall, step by step. A person keeps thinking about a sense object. Repeated thinking creates attachment. Attachment intensifies into burning desire. And when desire is blocked — anger erupts.
Watch a child in a toy shop. First, the child simply sees a toy. Then keeps looking at it. Then wants it. Then wants it badly. And when told 'not today' — tears, anger, a tantrum. The sequence is identical in adults; only the objects change. A phone, a promotion, a relationship — the chain is the same.
What makes this teaching extraordinary is its precision. Krishna is describing human psychology with the clarity of a scientist mapping a chemical chain reaction. Each step follows inevitably from the one before. The only place to break the chain is at the very first link — the repeated dwelling of the mind on sense objects.