What are the 4 principles of existentialism?

The Four Pillars of Existentialism: Facing Life’s Deepest Truths

At the heart of existentialism lies a confrontation with the fundamental realities of human existence. While existential thought spans decades and thinkers—from Kierkegaard and Nietzsche to Sartre and Camus—it was psychiatrist Irvin Yalom who distilled these profound concerns into four clear, inescapable truths in his 1980 book Existential Psychotherapy.

Death is the first and most universal of these. No matter how much we strive to live fully, we are all subject to mortality. Rather than a reason for despair, acknowledging death can inspire a deeper appreciation for life, urging us to live more authentically and intentionally.

Freedom is both a gift and a burden. With it comes radical responsibility. We are free to choose our paths, but that freedom means we can’t blame fate, society, or others for our lives. This weight can be overwhelming, yet it’s also what gives life its potential for meaning and authenticity.

Existential isolation speaks to the deep human experience of being alone in our subjective reality. No matter how close we are to others, no one can fully enter our inner world. This isn’t loneliness in the emotional sense, but a recognition of the inherent separateness of consciousness—something we must come to terms with, not escape.

Finally, meaninglessness confronts us with a universe that offers no built-in purpose. There’s no cosmic rulebook. But rather than leading to nihilism, this realization empowers us to create our own meaning—through love, work, art, or connection.

These four concerns aren’t problems to be solved, but dimensions to be lived with. In facing them honestly, Yalom suggests, we find the courage to live more deeply, more freely, and more truly human lives.