Sincerity doesn't pay....

Yesterday i felt that i have been too sincere towards my work but nobody respected it. Every single day i reach office early ,i am the first one to reach and almost the last one to leave. Any time of the day if there is work , i do it and finish it no matter how much time it takes. But then yesterday it made me think ..Is my sincerity being misused? Am i being too sincere ? And all these questions have made me stay back home and not go to office early today .. I am at home and writing this post ...