Tota felicitas aut infelicitas in hoc solo sita est; videlicet in qualitate obiecti, cui adhaeremus amore. - Benedictus de Spinoza

According to the seventeenth-century way of thinking, an atheist was by definition a decadent. If there was no God (or, at least, no providential, rewarding-and-punishing God of the sort worshipped in all the traditional religions), the reasoning went, then everything is permitted. So a non-beliver would be expected to indulge in all manner of sensual stimulation... to lie, cheat, and steal...
Spinoza, according to all seventeenth-century interpreters, rejected all the traditional ideas about God; he was indesputably a heretic. Yet his manner of living was humble and apparently free of vice. Then, as now, the philosopher seemed a living oxymoron: he was an ascetic sensualist, a spiritual materialist, a sociable hermit, a secular saint. How could his life have been so good, the critics asked, when his philosophy was so bad?

It may be observed, however, that Spinoza was not the first prominent monist and pantheist in modern Europe. A generation before him Bruno conveyed a similar message to humanity. Yet Bruno is merely a beautiful episode in the history of the human mind, while Spinoza is one of its most potent forces. Bruno was a rhapsodist and a poet, who was overwhelmed with artistic emotions; Spinoza, however, was spiritus purus and in his method the prototype of the philosopher.

Der Endzweck des Staates ist [...] im Grund die Freiheit.