Pure psychology must begin with the data of actual experience

Pure psychology (and consequently any psychology at all) must begin with the data of actual experience, that is to say, with my pure egoical lived experiences as perceptions-of, remembrances-of, and things of that sort, and never with hypotheses and abstractions, such as “sense data” and the like are.

Edmund Husserl’s Article for the Encyclopaedia Britannica (1927)