It is said always speak truth even if it is bitter।
Although they say " सच चाहे कितना भी कटु क्यों न हो हमेशा सत्य ही बोलना चाहिए । "
I believe there has to be balance between truthfulness and pleasantness . For this in my opinion following three rules should be the guide :-
Rule 1 - Always speak TRUTH Softly, Sweetly & Nicely, this will create happiness to all....Speak the truth and say it pleasantness.
Rule 2 - If the truth is unpleasant , do not speak.
Rule 3 - Even if it is pleasant do not speak falsehood.
" सत्य भाषी के साथ साथ मृदु भाषी भी होना जरुरी है । "