Be truthful always. It pays. The first and foremost benefit of being truthful is that it does not occupy your mind and increase your blood pressure. So health wise you stay cool and steady because of being truthful. The second and important benefit is that people around you will start seeing you as a good role model and will start respecting you more, because these days it is very difficult to find truthful people around. And that can also over a longer period of time land you up with more lucrative and responsible jobs which only eminent people can get. So go ahead and start being truthful, at least from now. all the best.