If I didn’t already own a copy of Arthur Melzer’s Philosophy Between the Lines, I’d have to buy it, if only to house this quote in my library:

As phenomena to be studied, discoveries are interesting, but forgettings are profound. Through the one, we explore and celebrate our insights, but through the other we discover our blindness. It is only through the encounter with a reality that we could not perceive that we see the limitations of our perception—and so begin the slow process of transcending them.