Marlow id a biased narrator

In Heart of Darkness by Joseph Conrad, the idea of restraint is explored in depth. Marlow spends much of his time throughout the narrative wrestling with his own ideas of what he thinks is restraint and what he thinks is indulgence. When psychoanalyzing the narrative using ideas put forth by Dr. Freud, Frederick R. Karl makes it clear that both the id and the superego strongly influence Marlow throughout his journey. Marlow's narrative becomes fragmented as he travels up river, deeper into an area where the superego has no presence. In the deep areas of the jungle, Marlow struggles to maintain the standards of his superego. When Marlow is recalling parts of his journey where he is struggling to fight off his id, his language becomes difficult to understand. These areas of the narrative are where Marlow's id becomes visible through the fragmented text. The reader disagrees with Marlow in these sections of the narrative because Marlow's personal bias is included with Marlow's id in these sections.