FC Barcelona's football philosophy is based on three principles: 1) Winning as many titles as possible, 2) Playing attractive football, and 3) Developing as many players from their youth academy as possible. Their general system is a 1-2-3-2-3 formation that prioritizes possession, transitioning quickly between offense and defense, and covering all areas of the pitch. The document provides detailed descriptions of tactical, mental, technical, and physical qualities for each position in their system.