At each stage...entirely new laws, concepts and generalizations are necessary, requiring inspiration and creativity to just as great a degree as in the previous one.
Poul AndersonIf we knew exactly what to expect throughout the Solar System, we would have no reason to explore it.
Poul AndersonHe had seen too much of the cosmos to have any great faith in man's ability to understand it.
Poul AndersonA fanatic's willingness to kill or be killed in the service of a cause cannot prove the rightness of that cause.
Poul AndersonColonization means potential immortality for the human genus. Man's safety on Earth was never great, and it dwindles hourly. Disarmament, even world government, will not guarantee survival in an age when population presses natural resources to the limit and when the knowledge of how to work mischief on a planetary scale is ever more widely diffused among peoples who may grow ever more desperate.
Poul Anderson