It reminds me about people's never-ending discrediting of and disbelief in mankind's unstoppable progress. "We will never reach the depths of the oceans." "We

It reminds me about people's never-ending discrediting of and disbelief in mankind's unstoppable progress. "We will never reach the depths of the oceans." "We will never reach all surfaces on the Earth." "We will never conquer the skies." "We will never reach space." "We will never colonize space, the Moon or Mars." (Yeah? Just wait...) etc.