“Bhikkhus, without directly knowing and fully understanding the eye, without developing dispassion towards it and abandoning it, one is incapable of destroying suffering. Without directly knowing and fully understanding the ear … the mind, without developing dispassion towards it and abandoning it, one is incapable of destroying suffering. But by directly knowing and fully understanding the eye … the mind, by developing dispassion towards it and abandoning it, one is capable of destroying suffering.” sn.iv.90
SN35_111: Ajjhattikāyatanaparijānanasutta
Ajjhattikāyatanaparijānanasutta - translated by Bhikkhu Bodhi