Existentialism emphasizes the importance of individual freedom and responsibility, and argues that meaning is created through our choices and actions.

Sartre's famous quote encapsulates the existentialist idea that we are not born with a predetermined essence or purpose, but rather create our own meaning through our existence.

Existential angst is a key concept in existentialism, referring to the anxiety and uncertainty that stem from our awareness of our own freedom and responsibility.

Camus's philosophy of absurdism emphasizes the inherent meaninglessness of life and the importance of embracing the absurd and living authentically in spite of it.

Nihilism is the philosophical belief that life is devoid of inherent meaning or purpose.

Sartre's play "No Exit" delves into the existentialist themes of freedom, responsibility, and the search for meaning in life.

Solipsism is the belief that the only thing that can be known for certain is the existence of one's own mind, and that the external world is merely a product of one's own consciousness.

Sartre's book "Being and Nothingness" is a seminal work in existentialist philosophy, exploring the themes of existence, nothingness, and the search for meaning in life.

Humanism is a philosophical and ethical stance that emphasizes the value and agency of human beings, and argues that the meaning of life is to strive for self-actualization and to fulfill one's potential.

Camus's novel "The Stranger" delves into the existentialist themes of alienation, meaninglessness, and the search for authenticity.

Existentialism emphasizes the importance of individual freedom and responsibility, and argues that the meaning of life is created through our choices and actions.

Beauvoir's book "The Second Sex" is a seminal work in feminist existentialism, exploring the themes of gender inequality, oppression, and the search for female authenticity.

Transcendentalism is a philosophical and literary movement that emphasizes the importance of intuition, experience, and the connection between the individual and the universe.

Kierkegaard's book "Fear and Trembling" is a seminal work in existentialism, exploring the themes of faith, anxiety, and the search for meaning in life.

Hedonism is a philosophical and ethical stance that emphasizes the pursuit of pleasure and the avoidance of pain as the primary goals of life.