Sartre was influenced at the time by the philosophy of Edmund Husserl and his phenomenological method.
(In fact, Heidegger is employing a revised version of the phenomenological method; see the hermeneutic circle).
Hence the phenomenological method relies on the description of phenomena as they are given to consciousness, in their immediacy.
Heidegger (1889-1976) applied the phenomenological method to understanding the meaning of being (Heidegger, 1962, 1968).
The introduction of the phenomenological method into psychopathology, for Minkowski, is the attempt to understand the lived experience of the mentally ill.
The phenomenological method doesn't deny but simply "puts into parentheses" those elements that sustain our ordinary perception.
The most important rule of the phenomenological method is that of "toward the same things."
Of course, the therapist may make a clinically relevant evaluation, but when applying the phenomenological method, temporarily suspends the need to express it.
In the field of religious studies, a contemporary advocate of the phenomenological method is Ninian Smart.
Kolnai's political thought arises from both his phenomenological method and his belief in the importance of philosophy for human life.