“Authentic thinking, thinking that is concerned about reality, does not take place in ivory tower isolation, but only in communication. If it is true that thought has meaning only when generated by action upon the world, the subordination of students to teachers becomes impossible.”
Source: Pedagogia do oprimido (Pedagogy of the Oppressed) (1968, English trans. 1970), Chapter 2
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Paulo Freire 115
educator and philosopher 1921–1997Related quotes

Review http://www.rogerebert.com/reviews/clerks-1994 of Clerks (4 November 1994)
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Indian Spirituality and Life (1919)
Context: The Infinite alone justifies the existence of the finite and the finite by itself has no entirely separate value or independent existence. Life, if it is not an illusion, is a divine Play, a manifestation of the glory of the Infinite. Or it is a means by which the soul growing in Nature through countless forms and many lives can approach, touch, feel and unite itself through love and knowledge and faith and adoration and a Godward will in works with this transcendent Being and this infinite Existence.
This Self or this self-existent Being is the one supreme reality, and all things else are either only appearances or only true by dependence upon it. It follows that self-realisation and God-realisation are the great business of the living and thinking human being. All life and thought are in the end a means of progress towards self-realisation and God-realisation.

Vol. I, Part 4.
The German Ideology (1845/46)
Context: Communism differs from all previous movements in that it overturns the basis of all earlier relations of production and intercourse, and for the first time consciously treats all natural premises as the creatures of hitherto existing men, strips them of their natural character and subjugates them to the power of the united individuals. Its organisation is, therefore, essentially economic, the material production of the conditions of this unity; it turns existing conditions into conditions of unity. The reality, which communism is creating, is precisely the true basis for rendering it impossible that anything should exist independently of individuals, insofar as reality is only a product of the preceding intercourse of individuals themselves.

Queer Science: The Use and Abuse of Research into Homosexuality, 1996, Cambridge: MIT Press. p. 9

Source: We Make the Road by Walking: Conversations on Education and Social Change