Sociologist C. Wright Mills states that using the sociological imagination to understand or reexamine any given social issue, "men... ...come to feel suddenly awakened in a house with which they had...

Sociologist C. Wright Mills states that using the sociological imagination to understand or reexamine any given social issue, "men... ...come to feel suddenly awakened in a house with which they had only supposed themselves to be familiar." What does he mean by this?