Sanna v. Vinnana


Yes , source of the perception, boundless , if it takes any identification it will be limited and delusion can only takes form in limitation of forms.

In the paticcasammupada the source is also the sankhara, it has no form , but what can be seen is just the result : mental, body, speech. Nobody ever seen sankhara because it can not be identified. Like we cannot see energy, only the result.