As I noted in The Joy of Revolution:

Much of the situationists' impact stemmed from the fact that they articulated things that most people had already experienced but were unable or afraid to express until someone else broke the ice. ("Our ideas are in everybody's mind.") If some situationist texts nevertheless seem difficult at first, this is because their dialectical structure goes against the grain of our conditioning. When this conditioning is broken they don't seem so obscure (they were the source of some of the most popular May 1968 graffiti). Many academic spectarors have floundered around trying unsuccessfully to resolve the various "contradictory" descriptions of the spectacle in The Society of the Spectacle into some single, "scientifically consistent" definition; but anyone engaged in contesting this society will find Debord's examination of it from different angles eminently clear and useful, and come to appreciate the fact that he never wastes a word in academic inanities or pointless expressions of outrage.

4
The spectacle is not a collection of images; it is a social relation between people that is mediated by images.

6
Understood in its totality, the spectacle is both the result and the project of the present mode of production. It is not a mere supplement or decoration added to the real world, it is the heart of this real society's unreality. In all of its particular manifestations -- news, propaganda, advertising, entertainment -- the spectacle is the model of the prevailing way of life. It is the omnipresent affirmation of the choices that have already been made in the sphere of production and in the consumption implied by that production. In both form and content the spectacle serves as a total justification of the conditions and goals of the existing system. The spectacle is also the constant presence of this justification since it monopolizes the majority of the time spent outside the modern production process.

11
In order to describe the spectacle, its formation, its functions, and the forces that work against it, it is necessary to make some artificial distinctions. In analyzing the spectacle we are obliged to a certain extent to use the spectacle's own language, in the sense that we have to operate on the methodological terrain of the society that expresses itself in the spectacle. For the spectacle is both the meaning and the agenda of our particular socio-economic formation. It is the historical moment in which we are caught.

16
The spectacle is able to subject human beings to itself because the economy has already totally subjugated them. It is nothing other than the economy developing for itself. It is at once a faithful reflection of the production of things and a distorting objectification of the producers.

13
The tautological character of the spectacle stems from the fact that its means and ends are identical. It is the sun that never sets over the empire of modern passivity. It covers the entire surface of the globe, endlessly basking in its own glory.

21
As long as necessity is socially dreamed, dreaming will remain necessary. The spectacle is the bad dream of a modern society in chains and ultimately expresses nothing more than its wish for sleep. The spectacle is the guardian of that sleep.

24
The spectacle is the ruling order's nonstop discourse about itself, its never-ending monologue of self-praise, its self-portrait at the stage of totalitarian domination of all aspects of life. The fetishistic appearance of pure objectivity in spectacular relations conceals their true character as relations between people and between classes: a second Nature, with its own inescapable laws, seems to dominate our environment. But the spectacle is not the inevitable consequence of some supposedly natural technological development. On the contrary, the society of the spectacle is a form that chooses its own technological content. If the spectacle, considered in the limited sense of the "mass media" that are its most glaring superficial manifestation, seems to be invading society in the form of a mere technical apparatus, it should be understood that this apparatus is in no way neutral and that it has been developed in accordance with the spectacle's internal dynamics. If the social needs of the age in which such technologies are developed can be met only through their mediation, if the administration of this society and all contact between people has become totally dependent on these means of instantaneous communication, it is because this "communication" is essentially unilateral. The concentration of these media thus amounts to concentrating in the hands of the administrators of the existing system the means that enable them to carry on this particular form of administration. The social separation reflected in the spectacle is inseparable from the modern state-that product of the social division of labor that is both the chief instrument of class rule and the concentrated expression of all social divisions.

25
[...] The spectacle keeps people in a state of unconsciousness as they pass through practical changes in their conditions of existence. Like a factitious god, it engenders itself and makes its own rules. It reveals itself for what it is: an autonomously developing separate power, based on the increasing productivity resulting from an increasingly refined division of labor into parcelized gestures dictated by the independent movement of machines and working for an ever-expanding market. In the course of this development, all community and all critical awareness have disintegrated; and the forces that were able to grow by separating from each other have not yet been reunited.

26
The general separation of worker and product tends to eliminate any direct personal communication between the producers and any comprehensive sense of what they are producing. With the increasing accumulation of separate products and the increasing concentration of the productive process, communication and comprehension are monopolized by the managers of the system. The triumph of this separation-based economic system proletarianizes the whole world.