As you pass from sunlight into darkness and back again every hour and a half, you become startlingly aware how artificial are thousands of boundaries we've created to separate and define. And for the first time in your life you feel in your gut the precious unity of the Earth and all the living things it supports.

— Russell 'Rusty' Schweikart, returning from Apollo 9

When old dreams die, new ones come to take their place. God pity a one-dream man.

— Esther Goddard, reading from her late husband's diary to the AP just prior to the launch of Apollo 11.