Here, Sartre explores the concept that God does not exist, thus we must face the consequences. He appears to paint a bleak picture, God's non existence means we must take full responibility for our actions. We are on our own in the world, we must comprehend what this fully means. Though, he does not advocate the school of thought which claims that God is dead so everything is permitted. We must always act and consider our values, quieitism is never a valid option. We must always act and from this freedom of action, Sartre claims his doctrine is one of optimism. This book is not very well written, largely due to the fat it was a lecture transcript though all his prevailent ideas are there. All in all, it is a very thought provoking read which advocates the value and worthiness of human beings.