How many times have you seen or heard mention of truth? Of those, how many mentions were about the truth, the whole truth, and nothing but the truth. I bet not many.
Instead, people like to reference a truth, his truth, her truth, their truth. Rarely do they say the truth.
Why do people talk like this? I suspect it is because people like the comforting warm fuzzies their subjective truth offers. Quite often the objective truth feels cold and hard, and who wants that?
Personally, I prefer truth to be on the colder, harder side. I like to know where I stand and how I measure up. Figuring that out is exponentially more difficult when the reference point keeps shifting.