They are considered as the instruments (karana) for the knowledge in the form of direct perception (pratyaksha jnana). [Cha. Sa. [[Vimana Sthana]] 4/4] | They are considered as the instruments (karana) for the knowledge in the form of direct perception (pratyaksha jnana). [Cha. Sa. [[Vimana Sthana]] 4/4] |