The preliminary assertion presents a metaphorical depiction of a previous state, contrasting with a doubtlessly totally different current situation. The phrase evokes a time when the atmospheric surroundings, as perceived visually, lacked illumination and readability, resembling a heavy, obscuring protecting. This might be interpreted actually, suggesting a interval of great atmospheric opacity, or figuratively, representing a lack of know-how, understanding, or progress.
The importance of this preliminary situation lies in its stark distinction with the potential for subsequent modifications. Understanding the circumstances that led to this “darkish blanket” permits for investigation into the processes which will have altered it. This will illuminate the evolution of atmospheric circumstances, the development of data, or the progress achieved in overcoming limitations. The historic context, whether or not literal or figurative, gives a baseline towards which to measure development and perceive the elements contributing to any subsequent transformation.