Most communication is the exchange of information: I tell you facts, give you instructions, or express my wishes, and you understand and respond. This kind of communication leaves the deeper self of both parties untouched. Existential communication is different: it is the meeting of two Existenzen, two free selves who each bring their whole being to the encounter and who allow the other's reality to challenge and transform their own. Such communication requires total openness, a willingness to be changed, and the courage to say what one truly thinks and feels.
Existential communication is a "loving struggle": loving because it is animated by genuine care for the other person and their Existenz, not by a desire to win or to convert; a struggle because genuine encounter involves challenge, resistance, and the clash of different perspectives. The friend who simply agrees with everything I say does not help me — the friend who challenges me, who refuses to let me rest in comfortable illusions, who insists on facing difficult truths together, is the partner of authentic communication. Jaspers holds that Existenz can only be realised in and through genuine communication with another Existenz.
Jaspers's account of communication shapes his understanding of philosophy itself. Philosophy is not a body of doctrine to be transmitted but a form of activity — a continuous conversation in which each participant is genuinely at stake. The great philosophers of the tradition are not sources of authoritative answers but partners in an ongoing dialogue: to read Plato or Kant seriously is to enter into existential communication with them, to be challenged by their questions rather than to absorb their conclusions. This is why Jaspers insists that philosophy cannot be separated from the person who does it.
The analysis of existential communication appears throughout Jaspers's work, most accessibly in Way to Wisdom (1950) and in the brief essay "On My Philosophy" (1941). It is the bridge between his analysis of Existenz and his practice as a teacher and public intellectual.