We must take care of our gardens. Those were the words of Voltaire through Candide. And those seven words do not simply mean to till the soil. It means that there is something better and this is not the best of all possibilities. For one need not till something that is already at its best.
In a way, it brings hope. For those who suffer, thinking that their state is already the best possible state, would lead to desperation and helplessness. If those in misery believe the contrary - that this is not the best of all possibilities, they would be hopeful. They could make their condition better.
In the first chapter, Voltaire presents the lavishness and abundance in life. We have a great and powerful baron, an admired philosopher and a desirable maiden. However, this is just the introduction to an irony. In Chapter 28, we find our great baron enslaved and beaten, the admired philosopher hanged, dissected and whipped. It would seem that the grandeur was not able to protect them from the worst that would later befall upon them. The glory and splendor did not last very long.
Candide had it right when he told Cacambo "You see, my dear friend, how perishable the riches of this world are". ...