In Spinoza´s philosophy, the essence of each singular thing is an effort to persevere in existing, an effort to resiste self-destruction, to resiste sorrow, to resiste servitude. In Spinoza, existing is resisting. Among all the singular things that exist, the human subjectivization process is the expression of that onthological resistance. Far away from individualistic anthropological conceptions, for Spinoza men is constituted by affects and inevitable meetings with other singular things. So, the constitution of men´s singularity is indissociable of society. And, denying any contratualist conception of society, Spinoza´s conception of multitude constitution - politic society´s constitution - is engendered by the dinamic of affective imitation. It´s, therefore, an expression of the individual effort on existing of each of it´s members, their effort for the constitution of their own singularity. With the constitution of multitude, the collective power, in his own effort of resisting self-decomposition, organizes itself in law and political institutions. Our philosopher presents a democratic concept of political power as an immanent expression of the collective power of multitude. For Spinoza it rests, all the time, in the hands of multitude, the power to build the most democratic of all political regimes or the most cruel of all tyrannies. Going through the most important concepts in Spinoza´s philosophy, our work makes an analysis of the concepts of resistance and of political obedience, and the possible relations between them. From the conception of an absolutily immanent relationship between multitude´s power and political power, we can understand why, in Spinoza´s democracy, it´s resistance that makes a citizen.