Can't have two faces..

There is something called radical honesty - being truthful in every situation. But can truth have various versions? How do we know if what we know as truth is the only version of it? Should we constantly doubt our own versions of the truth and modify it? How can we not become delusional, pedantic or radical by believing only our version of the truth and stop being open to accept other versions or variations? Should there be balance in saying the truth? Should we be silent sometimes when the truth can hurt someone? Is white lies ok to avoid hurting someone? How do we know if we are not slipping down our moral thresholds if we push the limit of not telling the truth, too far? Doesn't truth change over time - with expansion of the view point, more data being available? A sudden emergency, a catastrophe suddenly brings clarity to us that some truths should have been said early, somethings shouldn't have been ignored. But at the same time, when should truth telling be sweetened to avoid hurting egos vs when should it be plainly told to make the impact felt? Is there a bigger truth vs smaller truth? With whom can you tell the truth and with whom should you not? With someone if you can't tell the truth openly, what does that mean for the relationship? Should you be kind with even enemies and avoid hurting their ego? Should you be kinder with your loved ones and protect them from some harsh realities by not revealing everything? When should you withhold and when should you reveal? How should you say the truth? Saying it in one way vs the other changes the truth or the acceptance of it? Should there be a purpose to telling the truth? Saying the truth or lie for one's own benefit or for the sake of another - does it change how we choose to do it?