Amadeus

It's a fictional tale of a genius, narrated by a mediocrity. Having mere passion is not enough on the path of music, but with god's gift. Thus, a tragedy begins when a passionate court composer - Antonio Salieri met with the gifted musician - Wolfgang Amadeus Mozart.

Antonio Salieri is no doubt devoted to God, with his passion in music. Before meeting Mozart, he was already amazed by his piece and convinced that his talent was gift from God. Their first encounter was shocking to Salieri, expecting a paradigmatic person but seeing Mozart's libertine's side had crashed his fantasy. Nonetheless, he was subdued by Mozart's piece. During their first official meeting, Salieri presented his creation, "March of Welcome". Mozart could just play it from memory after hearing it once. He critiqued the piece and effortlessly transformed it. From there, Salieri's envy transforming into jealousy, the journey of him revenging on God began with no return. 

Cognitive Dissonance

It was very obvious to the audience that Salieri had strong cognitive dissonance. He was left in awe every time after listening to Mozart. He could not help but to recognize and acknowledge Mozart's talent. Yet, he was conflicted because he could not understand God's will in giving such great gift to the childish and presumptuous Mozart. He tried to reduce his dissonance by interpreting it as God's cruel despise on his mediocrity and hence wanted to revenge.

In my opinion, Mozart has the gift from God, of having the ability to compose wonderful classics; while Salieri, conscious of his oblivious gift, the ability to recognise and understand the gifted, but twisted it because of his dissatisfaction and jealousy of Mozart, and his misunderstanding of God's message.

Instead of Mozart's life, this film is more like a journey of transformation of Salieri's state of mind. From awe and admiration to jealousy and hatred, his life was tied to Mozart since the moment they met. Following Mozart's death, Salieri's passion in music and life were gone too.
Perhaps it's another blessing from God that Mozart never know what had led him to his death. Towards the end of his life, thinking that the murderer was his bosom friend while doing something he had devoted his life for, who says he's not the lucky one?

At the end of the film, Mozart's significant high-pitched laughter leads to the credit role, as if that was the purest and uncontaminated part of the film.