You can interpret the children in the beginning of the movie as himself as a child. It was a time of pure happiness and joy without any restraints in life. He reminisces about his past constantly now that he lives the working life, living in such a gray dull environment. Mark Osbourne does a great job at placing the main character in an environment that would foster insanity, or a need to escape from the real world. The energy, light, or ambition that arises from his stomach is the happiness and that feeling of being alive trapped up inside him. When he places his fingers in the path, they light up, and for a brief second the viewer gets a sense of hope that everything will be alright. The repetition of the scene with the children is constantly running through the main characters mind all day and night, causing him to not sleep at night and to day dream at work. His inability to grab a hold of his conscious state of reality makes him realize the rest of humanity is the in the same situation. They all are living meaningless lives, not happy, not content, just floating through this world like a gray blob. In order to save himself, he designs the goggles to reconnect with his younger, happier self. The goggles turn out so remarkable that he needs to have everyone own one. They are designed to view reality without any hardships, free and wonderful. The immense overwhelming sensation that the viewer gets as he puts on the bliss goggles for the first time almost gives them the same sensation as portrayed in the movie. In the end, he no longer has that happiness inside of him. He wasted it all on saving everyone else that now he is left with only the constant memories that continue to haunt him. He feels empty inside. He gave so much, yet received nothing in return. The bliss product reminds me of an acid trip ( not because of the obvious colors and forms). He finds the power of the energy, and overuses it to the point that it is now constantly part of his life whether he likes it or not. He cannot return to his normal state, and must now deal with the consequences of his actions.