That's way too big a question for social media format but I'll give a short answer.

Truth transcends the silly notion of object/subject duality that was brought into life by Aristotle. This "false" duality is only one tool of many to look at the world.
Truth is neither in the object or the subject, it is transjective. Meaning it's neither of them, or the relationship between the two.

First of all, we can only describe something from a human perspective, and though we seem pretty advanced to ourselves, we may be oblivious to many higher forms of consciousness.
And we can only give approximate descriptions with our flawed form of communication which is language, which in itself means that whatever we say is already NOT an absolute truth.

Maths is a lower tier truth, for it is verifiable.
But it's still a man-made concept, a tool to describe and navigate the world. But it still isn't necessarily "real".

This only poses more questions.

TLDR
Subject/object duality is a flawed, low tier description of reality.