Candide deals with the problems of suffering and evil. Voltaire attacks the hopelessness and callousness of the 'all is for the best' philosophy, personified by tutor Pangloss. The resilience of human nature is emphasized in the amazing reversals of fortune which Candide and his friends survive.

From Penguin Books 

Related Links:

Candide Summary  - Awerty Notes

Candide  by Voltaire - Online Literature

Candide  by Voltaire - alalettre( french version)