To be truly radical is to make hope possible rather than despair inevitable.

It is not primarily ideas that have a history; it is societies. And then what often seem opposed ideas can in the end be seen as parts of a single social process.

Once we begin to speak of men mixing their labour with the earth, we are in a whole world of new relations between man and nature, and to separate natural history from social history becomes extremely problematic.

The real dividing line between things we call work and the things we call leisure is that in leisure, however active we may be, we make our own choices and our own decisions. We feel for the time being that our life is our own.

The human crisis is always a crisis of understanding: what we genuinely understand we can do.

The idea of nature contains, though often unnoticed, an extraordinary amount of human history.

To be truly radical is to make hope possible rather than despair inevitable.