This exciting essay focuses on the explanation and analysis of Jean-Paul Sartre's Being and Nothingness, one the most influential works in history and whose understanding, due to its complexity and depth, escapes comprehension on a first reading. Whether you have already read Being and Nothingness or not, this essay will allow you to immerse yourself in each and every one of its meanings, opening a window to Sartre's philosophical thought and his true intention when he created this immortal work.