Does 'Existentialism Is A Humanism' Reject Religion?

Reading Sartre's 'Existentialism is a Humanism' was like having a philosophical lightning bolt strike me. His definition of freedom isn’t about doing whatever you want—it’s about the terrifying, exhilarating responsibility of creating your own meaning. Sartre argues we’re condemned to be free because we’re thrown into existence without a predefined purpose. Every choice we make isn’t just about us; it’s a statement about what humanity *should* be. If I choose to lie, I’m implicitly saying lying is acceptable for everyone. That weight is what makes freedom so intense. What stuck with me is how he ties freedom to authenticity. Pretending we’re not free—blaming society, genes, or horoscopes—is acting in 'bad faith.' True freedom means owning our choices, even when it’s agonizing. Sartre uses the example of a young man torn between joining the Resistance or caring for his mother. There’s no cosmic answer; his freedom lies in choosing and living with the consequences. This isn’t abstract—it’s why the book still guts me. Freedom isn’t a comfort; it’s a relentless demand to invent ourselves, moment by moment.

Reading Sartre's 'Existentialism is a Humanism' feels like having a philosophical adrenaline shot. The core argument is that existence precedes essence—we aren’t born with predetermined purposes but create meaning through our choices. This freedom is terrifying because it comes with absolute responsibility; there’s no divine plan or moral compass outside ourselves. Sartre slams excuses like "I was just following orders"—his famous "bad faith" concept—arguing we’re always free to choose, even in oppression. He also tackles criticisms head-on, like existentialism being too gloomy. Nope, he says it’s actually optimistic: if we’re condemned to be free, we can always reinvent ourselves. The text brilliantly connects individualism with collective responsibility—our choices shape not just us, but humanity’s image. It’s raw, urgent philosophy for anyone questioning life’s weight. What sticks with me is how Sartre turns existential dread into empowerment. Unlike religious or ideological doctrines handing you a prepackaged purpose, his philosophy forces you to confront life’s chaos head-on. The lecture-style delivery makes complex ideas accessible—no jargon, just straight talk about anguish (the dizziness of freedom), abandonment (no God to guide us), and despair (we can only control our actions). His rebuttal to Marxists and Christians is savage: both systems dodge accountability by outsourcing morality. The kicker? Even not choosing is a choice. By framing humans as works-in-progress, Sartre makes existentialism a call to action rather than navel-gazing.

I’ve always been fascinated by the debates around 'Existentialism is a Humanism' because Sartre’s lecture seems to simplify existentialism into something almost too digestible. Critics argue he watered down the darker, more complex themes of his earlier work to make it palatable for a general audience. The lecture frames existentialism as an optimistic philosophy centered on human freedom and responsibility, but this glosses over the inherent absurdity and despair in works like 'Nausea' or 'Being and Nothingness'. Some philosophers, especially those aligned with Heidegger, accused Sartre of misrepresenting existentialism by focusing too much on individual choice and ignoring the weight of historical and social structures. What’s really controversial is how Sartre’s humanist turn clashes with his earlier rejection of universal human nature. By claiming existentialism is a humanism, he seemed to backtrack on the idea that existence precedes essence, which was radical at the time. Camus and others saw this as a contradiction—how can you champion absolute freedom while also appealing to shared human values? The lecture also drew flak for being too abstract; it talks about responsibility but doesn’t address concrete political or ethical dilemmas. It’s like Sartre tried to make existentialism a feel-good philosophy, which rubbed purists the wrong way.