To me, this song seems to be saying that people would do well not to overthink life as a whole.
For example, the line
"Why do you question, when there's no answer told?"
seems to be pointing out that the question
"What is the [universal, objective] purpose of life?"
can't possibly have an answer, so there's no point in asking it.
We assume that there must be some grandiose purpose or meaning explaining why we are on Earth, and how we ought to spend our time. In fact, there is no such overarching meaning or purpose.
Hence:
"Don't look for something.
Plain truth is nothing -
nothing but the plain truth."
i.e. It is plainly apparent that there is no objective "purpose of life", so there is no point in asking these meaningless questions.
To me, this song seems to be saying that people would do well not to overthink life as a whole.
For example, the line "Why do you question, when there's no answer told?"
seems to be pointing out that the question "What is the [universal, objective] purpose of life?"
can't possibly have an answer, so there's no point in asking it.
We assume that there must be some grandiose purpose or meaning explaining why we are on Earth, and how we ought to spend our time. In fact, there is no such overarching meaning or purpose.
Hence: "Don't look for something. Plain truth is nothing - nothing but the plain truth."
i.e. It is plainly apparent that there is no objective "purpose of life", so there is no point in asking these meaningless questions.