Summary
This quote suggests that interest, or personal motivation, can have contrasting effects on people. On one hand, it can blind individuals, causing them to overlook or disregard certain aspects or consequences. This is because their interest skews their perception and hinders objective judgment. On the other hand, interest can make some people quick-sighted, enabling them to see and seize opportunities, make calculated decisions, and achieve their goals efficiently. Essentially, the nature of one's interest determines whether they are hindered by blindness or empowered by a sharp, focused vision.