“Kismiṁ nu kho, bhikkhave, sati kiṁ upādāya uppajjati ajjhattaṁ sukhaṁ dukkhan”ti?   
“Mendicants, when what exists, because of grasping what, do pleasure and pain arise in oneself?”
“Cakkhusmiṁ kho, bhikkhave, sati cakkhuṁ upādāya uppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe…   
“Mendicants, when there’s an eye, because of grasping the eye, pleasure and pain arise in oneself. …
manasmiṁ sati manaṁ upādāya uppajjati ajjhattaṁ sukhaṁ dukkhaṁ.   
When there’s a mind, because of grasping the mind, pleasure and pain arise in oneself.
“Yaṁ panāniccaṁ dukkhaṁ vipariṇāmadhammaṁ, api nu taṁ anupādāya uppajjeyya ajjhattaṁ sukhaṁ dukkhan”ti?   
“But by not grasping what’s impermanent, suffering, and perishable, would pleasure and pain arise in oneself?”
“Yaṁ panāniccaṁ dukkhaṁ vipariṇāmadhammaṁ, api nu taṁ anupādāya uppajjeyya ajjhattaṁ sukhaṁ dukkhan”ti?   
sn35.105
“Yaṁ panāniccaṁ dukkhaṁ vipariṇāmadhammaṁ, api nu taṁ anupādāya uppajjeyya ajjhattaṁ sukhaṁ dukkhan”ti?   
“But by not grasping what’s impermanent, suffering, and perishable, would pleasure and pain arise in oneself?”

Evameva kho, bhikkhave, cakkhusmiṁ sati cakkhusamphassapaccayā uppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe…   
In the same way, when there’s an eye, pleasure and pain arise internally conditioned by eye contact.
jivhāya sati jivhāsamphassapaccayā uppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe…   
When there’s an ear … nose … tongue … body …
manasmiṁ sati manosamphassapaccayā uppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe….   
mind, pleasure and pain arise internally conditioned by mind contact.
Evameva kho, bhikkhave, cakkhusmiṁ asati cakkhusamphassapaccayā nuppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe…   
In the same way, when there’s no eye, pleasure and pain don’t arise internally conditioned by eye contact.
manasmiṁ asati manosamphassapaccayā nuppajjati ajjhattaṁ sukhaṁ dukkhan”ti.   
mind, pleasure and pain don’t arise internally conditioned by mind contact.” "

Evameva kho, bhikkhave, cakkhusmiṁ sati cakkhusamphassapaccayā uppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe…   
In the same way, when there’s an eye, pleasure and pain arise internally conditioned by eye contact.
manasmiṁ sati manosamphassapaccayā uppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe….   
mind, pleasure and pain arise internally conditioned by mind contact.
Evameva kho, bhikkhave, cakkhusmiṁ asati cakkhusamphassapaccayā nuppajjati ajjhattaṁ sukhaṁ dukkhaṁ …pe…   
In the same way, when there’s no eye, pleasure and pain don’t arise internally conditioned by eye contact.
manasmiṁ asati manosamphassapaccayā nuppajjati ajjhattaṁ sukhaṁ dukkhan”ti.   
mind, pleasure and pain don’t arise internally conditioned by mind contact.”