That’s the same problem we have in trying to understand one another without somehow changing our underlying makeup. We want to dig up the artifacts of an individual life to understand how one gets to be the way he or she is at the moment. However, our interactions always disturb the essential nature of one another.
No, we aren’t turning each other into some powder for examination, but in examining we add something of each to other.
No precious artifact from the historical development of another can be examined without interference. We have no nondestructive neutron diffractometer for character and character development. Whatever we dig up from personal history, we alter by what we are in the present. We always end up breaking or altering the vase (“vace” or “vahze”) of development.