How does perspective shape or alter truth?

[Chloe]

In the book, Aza is a good example to use for this essential question. Aza is constantly thinking about things very deeply and almost overthinking things extremely. Because of this her experience of certain experiences is different from what others may be because she struggles. For example, when Aza and Davis kissed her perspective on the situation was different than his because she was constantly thinking about the germs that was altering what was happening.

[Alisar]

I think that there is the ultimate truth which is the way some force from the outside sees a certain incident. But each participant in this incident believes their own truth. Thus, truth is not static.
But if so, then how can we look at our daily facts? Or how can we look at our history?
In addition to the example mentioned in the comment above mine, there were the situation between Aza and Daisey where the latter threw charges that Aza rebutalled in a mumbled voice, trumpeting the concept discussed here.