Brother i will honestly advise you not to leave your current job at any cost except if found another job having higher level than the previous one. You are good educated person and know really well the current situation in the employment sector in this country. I am not that much aware of the teaching job but a highly respected one in the society. I have heard through someone that study leave can be availed easily during the teaching profession so if you are studying for CSS then you can opt for the option of availing leave rather than to quit. As for as your surrounding community is concerned you should not take such a strange decision on their will only as you may be the one who slowly gets to top rather than at once. So please donot do something silly enough to ruin your career rather perform your duties and mean while aim high at other stages which will definitely pave you to the highest desired level.