Determination by causes inherent in the organism, as in idiopathic somnambulism, self-induced trance or self-mesmerization, etc. See suggestion.(noun)
The Century Dictionary (Public Domain)
Use "self-suggestion" in a sentence
"There was nothing that I could resolve as distinct against background and that could not be reduced to my own mental function or self-suggestion."
"SHANOR: Hypnosis is basically self-suggestion, relaxation."
"Before every trip, with self-hypnosis and self-suggestion, I erase my own memories -- a sort of artificial amnesia -- so that the Lhari can't find out any more than I want them to find out."