Noun
(music) A vocal part intermediate between the highest and the lowest.
Used other than figuratively or idiomatically: see inner, voice.
Source: en.wiktionary.orgConscience is the inner voice that warns us that someone might be looking. H. L. Mencken
The musician writes for the orchestra what his inner voice sings to him; the painter rarely relies without disadvantage solely upon the images which his inner eye presents to him; nature gives him his forms, study governs his combinations of them. Hermann Ebbinghaus
Nature... is nothing but the inner voice of self-interest. Charles Baudelaire
What the inner voice says Will not disappoint the hoping soul. Friedrich Schiller
Being active every day makes it easier to hear that inner voice. Haruki Murakami
The only thing new is you finding out about something. Like nothing's really new, but you reinvent it for yourself and find your inner voice. Mike Watt