This quote reflects a deeply ingrained superstition and stigma that has been historically attached to left-handedness in various cultures. The phrasing is harsh and prejudiced, implying that individuals who use their left hand are inherently linked to negative or evil forces. While the literal meaning is problematic, it invites us to consider how society often labels and marginalizes what it does not understand or what diverges from the norm. In this case, left-handedness, a natural variation among humans, was at times unfairly demonized.

Reflecting on this from the perspective of The Thorn Birds, a novel rich in exploring human nature, family dynamics, and societal constraints, the quote can be a metaphor for how characters or traits that differ greatly from mainstream expectations may face unwarranted judgment or exclusion. It underscores the human tendency to fear or condemn what is different, rather than accepting diversity.

In a broader sense, this quote challenges us to rethink the sources of prejudice and the harm caused by baseless superstition. Today, left-handedness is widely recognized as a normal aspect of human biology without any negative connotations. This progression in understanding reflects societal growth towards acceptance and respect for differences. Therefore, this quote, despite its negativity, serves as a reminder of the importance of compassion and critical thinking when faced with cultural myths that devalue individuals based on arbitrary attributes.