In 1905, he began experimenting with socialist philosophy, but, after World War I, he began recognizing that a "lust for power" underlay all forms of political behavior. However, even before the war, "other aspects of his sensibility had competed with his radical leanings," notes Rubin. She adds that "the most concrete of those was a persistent penchant for philosophy. With his Energy invested in Baruch Spinoza, he made little room for the Russian anarchist Mikhail Bakunin. From then on, writes Rubin, "his retention of a model of selfhood predicated on discipline made him unsympathetic to anarchist injunctions to 'be yourself.'... To be one's 'deliberate self,' he explained, meant to 'rise above' the impulse to 'become the slaves of our passions' and instead to act with 'courageous devotion' to a moral cause."