WHAT IS TRUTH?

this is the big question of the day

IS TRUTH OBJECTIVE OR SUBJECTIVE?

what does this mean? well, is it up to us to decide what the truth is?

for example, is it up to us to decide if heaven is real or not. Is heaven real because that is the truth or because we feel it is.
I believe that how we answer this question as an individual shows how we view the bible and our salvation. It makes the difference between a christian, a moralist or an atheist. I just had a conversation with someone who believed that there is no heaven or hell, and all religious beliefs are man-made, therefore we just have to do the best we can on this earth and that's all God needs us to do and he believes this is true because that is how he views life. so therefore, Is God bound to judge us according to the laws that we have created for ourselves or according to his law?

This goes deeper than just a moralist view, some people in Christendom practice some things that are not backed by the bible but they believe it is the truth because they feel it is, so God must be ok with it.

so what is truth?

this is my big question
please leave your comments below, thanks