Sentence:  The better we realise these differences, the more averse shall we be to predicting to what depth into our cellular being such perception may be pushed by those artifices of hypnotic trance, automatic writing, &c., which we are only just learning to employ. Who, even now, can maintain that there is any true psychological line of distinction between those processes which happen to rise above the threshold of our ordinary consciousness — which become <WSD>super-liminal</WSD> — and those processes which happen to remain sub-liminal throughout our whole bodily life? 
Meaning of the word marked with <WSD> tags:  Of, pertaining to, or involving a supposed kind of awareness which is above and beyond the experiential range of normal consciousness.