You can become a Communist only when you enrich your mind with a knowledge of all the treasures created by mankind.
Only struggle educates the exploited class. Only struggle discloses to it the magnitude of its own power, widens its horizon, enhances its abilities, clarifies its mind, forges its will.
Materialism is the recognition of "objects in themselves", or outside the mind; ideas and sensations are copies of images of those objects.
The sole "property" of matter with whose recognition philosophical materialism is bound up is the property of being an objective reality, of existing outside the mind.