The world we live in today is full of surprise and mystery. Anything that exists could or does have a hidden meaning or message. Scientific studies show that some ancient scripts and symbols are not languages. They're actually just warning signs or messages. But today we give hidden meaning to our own type of art. Such as music, motion pictures and art itself, or anything you can put meaning to. I think the best example of allegorical meaning is through music. In this heavy metal song "Chop Suey" by System of a down there are several religious mocks and a little bit of backmasking. Here are the song's lyrics in blue font.
             i just crossed the feeling with a shakeup (i just crossed the feeling with a)
             why'd you leave the keys upon the table
             here you go creating another fable (you wanted to)
             grab her 'fore she put a little makeup (you wanted to)
             i just crossed the feeling with a shakeup (you wanted to)
             why'd you leave the keys upon the table (you wanted to)
             i don't think you trust in my self-righteous suicide
             i just crossed the feeling with (i just crossed the feeling with a)
             why'd you leave the keys upon the table
             (here you go) we need another fable (you wanted to)
             grab her 'fore she put a little makeup (you wanted to)
             i just crossed the feeling with a shakeup (you wanted to)
             why'd you leave the keys upon the table (you wanted to)
             i don't think you trust in my self-righteous suicide
             i cry when angels deserve to die in my self-righteous suicide
             father, into your hands i commend my spirit
             father, into your hands, why have you forsaken me?
             ...