Juliek's final concert reveals that he was a passionate and talented musician. He plays a piece of music that he composed himself, which shows his creativity and skill. He plays with such emotion and intensity that it brings tears to the eyes of those who are listening. Even in the midst of the chaos and destruction of the concentration camp, Juliek is able to find beauty and solace in his music. This reveals his resilience and strength of character, as he is able to find joy and peace in the midst of such darkness. Furthermore, when he finishes playing, he looks up to the sky and smiles, showing his appreciation for the beauty of life and music. This reveals his optimism and hope, even in the face of such tragedy.
