“When a place gets crowded enough to require ID's, social collapse is not far away. It is time to go elsewhere. The best thing about space travel is that it made it possible to go elsewhere.”

“There is no way that writers can be tamed and rendered civilized or even cured. The only solution known to science is to provide the patient with an isolation room, where he can endure the acute stages in private and where food can be poked in to him with a stick.”

“I never learned from a man who agreed with me.”

“An armed society is a polite society. Manners are good when one may have to back up his acts with his life.”

“You can have peace. Or you can have freedom. Don't ever count on having both at once.”

“Women and cats will do as they please, and men and dogs should relax and get used to the idea.”

“When a place gets crowded enough to require ID's, social collapse is not far away. It is time to go elsewhere. The best thing about space travel is that it made it possible to go elsewhere.”