The vedaniya karmas are of two types: Sat vedaniya karma and asat vedaniya karma. How does one experience this? The body is one factor. That cognition comes through the body. The experience of both the sat and the asat vedaniya karmas comes through the body. If the energy of the body is in good state, then there would be the experience of the sat vedaniya. If the energy of the body is in disarray, then these would be the experience of the asat vedaniya, which would bring the experience of pain. The gross body acquires its energy from the (luminous) body. The body has a structure. It has an aura. If it remains in the right state, these would be the sensation of the sat vedaniya and if it Is disturbed, there would be the cognition of the asat vedaniya - The same is the case with the mind. The mind also operates with the help of energy. If our biological energy operates well and the energy of the luminous body is in the right state, then the mind would be cheerful and happy. If that energy is disturbed, then the mind would be agitated, unhappy and would have bad thoughts.
Just as the body is the cause of the sensation of happiness or unhappiness, the mind and the speech also become the causes of the sensation. The subtle vibrations of sound also result in the sensations of happiness or unhappiness. Listening to music brings the sensation of happiness. And listening to lamentation would lead to mental anguish. If our own vibrations of sound are excellent and free from fear, then we would have the sensation of happiness. If those vibrations are not good, then we would start having the sensation of unhappiness. This point is very important.