In this essay, the author sets out the question: where bodies move according to Spinoza's physical thought? The question is linked to another one Oldenberg asked him then, about how objects acquire their unique individuality and the way nature behaves as a unit, despite the complexity of its constitution. The response refers not only to Spinoza’s criticism to Cartesian mechanics, as usual, but will appeal to Spinoza’s own interpretation, consistent with his system, about the constitution and dynamics of the physical world, in terms of a mechanic interaction between bodies, firm enough to accomplish the task for which it was designed.