A profile of the French philosopher from The New Yorker, worth reading.:

It would be nice to say that Voltaire was a courageous man whom no amount of comfort could seduce. The truth is that, as his friend Condorcet wrote sadly, he was easily terrified, and often a coward: “He was often seen to expose himself to the storm, almost with temerity, but seldom to stand up to it with firmness.” And, of course, no man of fewer sublime feelings has ever lived; he was baffled by religion and spirituality, materialist and carnal to the core.