E.V. Il'enkov is regarded as perhaps the most "Spinozist" of Soviet philosophers. He used Spinoza's ideas extensively, especially in developing his concept of the ideal and in his attempts to give a more precise philosophical formulation to the "activity approach" of the cultural- historical school of Soviet psychology. A more detailed analysis reveals, however, that Il'enkov's reception of Spinoza was highly selective, and that there are substantial differences between them.