Lev Vygotsky

"Through others, we become ourselves."

"As in the focus of a magnifying glass, play contains all developmental tendencies in a condensed form and is itself a major source of development."

"From the great creations of Spinoza, as from distant stars, light takes several centuries to reach us. Only the psychology of the future will be able to realize the ideas of Spinoza."

"My intellect has been shaped under the sign of Spinoza's words, and it has tried not to be astounded, not to laugh, not to cry, but to understand."

"The philosophical perspective opens before is at this point of our study. For the first time in the process of psychological studies we can resolve essentially purely philosophical problems by means of a psychological experiment and demonstrate empirically the origin of the freedom of human will. We cannot trace in all its completeness the philosophical perspective opening before us here. We expect to do this in another work devotes to philosophy. Now we shall try only to note this perspective in order to see most clearly the place we have reached. We cannot help but note that we have come to the same understanding of freedom and self-control that Spinoza developed in his “Ethics.”"

"...In a few words, we can define the true relation of Spinozist teaching on passions to explanatory and descriptive psychology of emotions, saying that, practically speaking, this teaching on solving the one and only problem, the problem of a deterministic, causal explanation of what is higher in the life of human passions, also partially contains explanatory psychology, retaining the idea of causal explanation but rejecting the problem of the higher in human passions, and descriptive psychology, rejecting the idea of a causal explanation and retaining the problem of the higher in the life of human passions. Thus, forming its deepest and most internal nucleus, Spinoza's teaching contains specifically what is in neither of the two parts into which contemporary psychology of emotions has disintegrated: the unity of the causal explanation and the problem of the vital significance of human passions, the unity of descriptive and explanatory psychology of feelings. For this reason, Spinoza is closely connected with the most vital, the most critical news of the day for contemporary psychology of emotions, news of the day which prevails in it, determining the paroxysm of crisis that envelops it. The problems of Spinoza await their solution, without which tomorrow’s day in our psychology is impossible."