What is true? Listener question

You often say something like : see what's true, or what is real. This is highly confusing to me. 

I don't know what the definition of 'true' or 'real' could be. Doesn't it depend of situation and person and, and, and? So it's highly subjective and transient?

For example I might see in a moment the truth as beeing treated unfairly by someone, and in another moment just feeling angry, in another moment just feeling energy moving through my body and in another moment just a body sitting. All truth about the same situation. Someone else might not even see a body, as there are no bodys. Well I'm making this up, it's not my experience but I have heard people saying that. So many different truths and realities? 

Is truth always the momentary subjective truth? Or is there another truth? 

So what is the truth or the reality you speak about? This words really send me in a complete confusion.