The truth is: the uninterpreted situation
considder: By measuring an object’s position with something that causes it to move (eg a wave) you cannot know its correct position (because you caused it to move)
This is known as quantum uncertainty.
The same can be applied to the the concept of knowledge or “the truth” as it is otherwise called.
All that we see including “the universe” is a perception of whatever is or was there. Therefore what we think of as the truth, is an interpretation of it and is therefore not the truth as it is or indeed was.
To say you know the truth is a lie, since by trying to work out what the truth is, you changed one perception of it to another and still will not know the truth as it is or was, but instead will only know a perception of it.
“the truth” whatever it is, is whatever is there, but cannot be percieved or interpreted by us. However, It IS defined (for encyclopedic publications) as “the unpercieved situation” (not the universe, since that is an interpretation of whatever the truth is, and also not god, since that is also a perception of whatever is there)
In conclusion:
Religious theories claiming the existance of god cannot be said to be the truth.
Theories claiming the non existance of god cannot also be said to be the truth.
The physical truth is something that our perceptions of the universe are but the tip of the iceberg.
Perhaps science, religion and all the other persuits for enlightenment is a fruitless excercise. Perhaps we cannot be enlightened.