"All men are intellectuals, one could therefore say: but not all men have in society the function of intellectuals.
When one distinguishes between intellectuals and non-intellectuals, one is referring in reality only to the immediate social function of the professional category of intellectuals, that is one has in mind the direction in which other specific professional activity is weighed, whether towards intellectual elaboration or towards muscular-nervous effort. This means that, although one can speak of intellectuals, one cannot speak of non-intellectuals, because non-intellectuals do not exist. But even the relationship between efforts of intellectual-cerebral elaboration and muscular nervous effort is not always the same, so that there are varying degrees of specific intellectual activity. There is no human activity from which every form of intellectual participation can be excluded: homo faber cannot be separated from homo sapiens. Each man, finally, outside his professional activity, carries on some form of intellectual activity, that is, he is a philosopher, an artist, a man of taste, he participates in a particular conception of the world, has a conscious line of moral conduct, and therefore contributes to sustain a conception of the world or to modify it, that is, to bring into being new modes of thought".
Antonio Gramsci, Selections from Prison Notebooks