The Story of A Gardener

Once there was a gardener who worked in 5 houses. He took care of their gardens very well. He was concerned and a very hard-working man. It was one of his habits that every month when he got his salary from each house, he went to the STD booth and called every house being a different gardener at the phone saying, "hello, actually I wanted a job so do you need a gardener." Always he got the same reply, " No we already have a gardener and he is doing his job well." and when someone said  'yes' then he asked why, whatever the reason they gave, he tried to improve on them. So he worked at all those houses for about 26 years. It is said that he died as he met with an accident.
Moral: "Always try to improve upon your mistakes and never give up."