This extensive excerpt details Viktor Suvorov's journey through the intricate and brutal world of Soviet military intelligence, specifically the GRU (Chief Directorate of Intelligence of the General Staff), known internally as "The Aquarium." The narrative follows his progression from a company commander through various intelligence roles, including intense Spetsnaz training and agent recruitment abroad in places like Vienna and Geneva. It highlights the extreme secrecy and ruthless discipline within the GRU, contrasting it with the perceived less secretive KGB, and illustrates the constant psychological and physical pressures faced by its operatives. The text also touches on the political machinations and personal sacrifices inherent in this hidden service, often requiring morally ambiguous actions and an unwavering commitment to the Soviet state.