Final answer:
The quote is from Sigmund Freud who discussed the latency period in psychosexual development where children develop psychological forces like loathing, shame, and moral ideals which later influence their sexual life. This is part of Freud's broader theories on personality and the unconscious mind.
Step-by-step explanation:
The quote "It is during this period of total or at least partial latency that the psychic forces develop which later act as inhibitions on the sexual life, and narrow its direction like dams. These psychic forces are loathing, shame, and moral and esthetic ideal demands." is attributed to Sigmund Freud. He discussed the concepts of psychological development and the formation of personality. Freud introduced the notion of the latency period, during which sexual feelings are dormant as children concentrate on other aspects of their development.
Freud's comprehensive theory of personality and psychosexual development includes the latency stage, where children are engaged mainly in non-sexual activities and begin to develop critical psychological attributes, such as loathing, shame, and moral and aesthetic ideals. These attributes are seen by Freud as necessary inhibitions that help direct sexual energy as individuals develop. This idea is part of Freud's wider theory regarding the unconscious mind's influence on behavior and personality.