Truth

In the poem On the Road Home, Wallace Stevens questions the idea of absolute truth. He states that there is no such thing as the truth. This is true when considering what source a truth comes from. Truth is only true to the person who believes it. The world must be measured by eye indeed, since truth changes according to the observer. Consider the Kurosawa movie Rashomon, where witnesses called to testify at the trial of a murder each have their own version of the truth, and no story seems to corroborate with the others. When trying to explain truths in the form of religion, obviously they will have different interpretations that do not fit for everyone. In addition, religions may assert untruth, or myths that followers are expected to believe. The danger in belief of untruth occurs when violence is the end result from the beliefs that result. This is what Stevens seems to suggest in the fifth stanza (or at least whoever he was talking to) by saying "The idols have seen lots of poverty, Snakes and gold and lice, But not the truth". What then is the truth? What do we owe to our existence? Or is seeking the knowledge of the truth like seeking sour grapes (first stanza)? I don't believe this, but will instead continue to seek the truth in this existence, since it is up to the observer to interpret what he sees in order to understand a mystery.