Human tongue performs two functions- one of taste and another of speech. If we eat judiciously and with temperance, we shall have no health problems. If we use our tongue for eating uneatables or overeat, health problems will arise. The second function of the tongue is that of speech, which is of great importance. Speaking bitter, unpleasant and unpalatable words to people is certain to antagonise them, even to turn them into enemies. Sweet and pleasant speech befriends people and exercises wholesome effect on our social relations. An unsavoury tongue is sure to pollute the social relationships and create tensions which will bring nothing but misery and sorrow. Control of the tongue in respect of both of its functions is a sine qua non of personal happiness and sweet social intercourse. So the motto it: have control on your tongue.