Donald A. Wollheim Quotes

Human nature is violent, argumentative, fallible, and given to endless fantasizing.

While the circumnavigation of the solar system seems farfetched, it may not be once the problem of effective anti-gravitational control is solved.

I think that space flight is a condition of Nature that comes into effect when an intelligent species reaches the saturation point of its planetary habitat combined with a certain level of technological ability... I think it is a built-in gene-directed drive for the spreading of the species and its continuation.