Action to be effective must be directed to clearly conceived ends.

When the present is full of gloom, the past becomes haven of refuge that provides relief and inspiration.

Every great revolution, whether it is right or not, we really know has any vital, urgent need to basis. It comes not just from itself.

Socialism is... not only a way of life, but a certain scientific approach to social and economic problems.

What we really are matters more than what other people think of us.

Crises and deadlocks when they occur have at least this advantage, that they force us to think.

The only alternative to coexistence is codestruction.