According to Christopher Bullock in
The Cobbler of Preston (1716), "'Tis impossible to be sure of any thing but Death and Taxes." Many people believe that, but is it really true? Taxes may well be certain, but what about death? Tales of immortal beings abound in fiction and folklore, but can humans actually become physical immortal? Physical immortality simply means not dying, but few people would want to live for centuries in a sick, disabled body, so the definition should probably be expanded to "living for centuries in the same body in good health."
