The number-one philosophical battle therefore takes place on the frontier between the scientific and the ideological. There the idealist philosophies… - Louis Althusser

To become 'ideologists of the working class' (Lenin), 'organic intellectuals' of the proletariat (Gramsci), intellectuals have to carry out a radical revolution in their ideas: a long, painful and difficult re-education. An endless external and internal struggle.

The reproduction of labour power thus reveals as its sine qua non not only the reproduction of its ‘skills’ but also the reproduction of its subjection to the ruling ideology. ... It is in the forms and under the forms of ideological subjection that provision is made for the reproduction of the skills of labour power.

For you and for me, the category of the subject is a primary ‘obviousness’ (obviousnesses are always primary): it is clear that you and I are subjects (free, ethical, etc.). Like all obviousnesses, including those that make a word ‘name a thing’ or ‘have a meaning’ (therefore including the obviousness of the ‘transparency’ of language), the ‘obviousness’ that you and I are subjects – and that that does not cause any problems – is an ideological effect, the elementary ideological effect. It is indeed a peculiarity of ideology that it imposes (without appearing to do so, since these are ‘obviousnesses’) obviousnesses as obviousnesses.