Sincere in the work should have become a handle of life on a person, because if a job is done with sincerity, then the result will be seen quickly.
if a job is done with sincerity, let alone for the benefit of others and not only benefit themselves, then the results will be very large, because God who reward.
like a teacher who has taught his knowledge to his students with sincerity and sincerity, because the science can still be enjoyed for generations to date even though he has died.
Happy to perform fasting, may be given longevity, health, easy sustenance by Allah SWT.
(especially Muslims around the world)