The pioneer

Referring to Freud, from Harry Guntrip's Psychoanalytic Theory, Therapy, and the Self (1971):

It is not the function of the pioneer to say the last word but to say the first word. That is the most difficult step. All the pioneer has to begin with is a problem, which has always been there, but hitherto no one has looked at that phenomenon in this particular way. The pioneer suddenly asks a new kind of question. Once the all-important start has been made along some new line of investigation, those who come after have only to faithfully follow up every possible line of inquiry it suggests. Some of these will be false trails, others will lead somewhere, but all have to be explored.