Relativity?

Okay, so in school we were reading The Things The Carried, right? And my teacher was talking about the way Tim O'Brien (Author) portrayed Truth as a relative substance. And that got me to think about many things in mai life and whether they are "true" or just all in the way I look at them. Like justice (one of mai many examples...you can come up with your own). Is justice truly justice? I mean, when you think about it, can you TRULY tell me what justice is, or only how you depict it? I think not! We cant really tell anyone what it true or not because people have different perception of truth. so in saying that, I comment that not only is justice, or love, or pain, or hatred, relative, but can never tell anyone the true meaning of anything because truth, in itself is relative! there is no true Truth, only people's perceptions of it. So technically speaking, there is no true truth, but insted of it become a false Truth, it only becomes a false sense of Truth. And to take things a step further, isn't relativity in itself, relative? I mean, plenty of people i know percieve relativity in different ways. thus relativity is relative and nothing is as it truly seems...