These resonances between the personal and the professional are the source of both insight and error. You avoid mistakes and distortions not so much by trying to build a wall between the observer and the observed as by observing the observer - observing yourself [...] All light is refracted in the mind. To look through such a lens it becomes important to know the properties of the lens. This is the scientific goal of biographical work on social scientists.

— With A Daughter's Eye by Mary Catherine Bateson (Page 161)