They'll lead us bit by bit toward the revolutionary idea that we've grown about as powerful as it's wise to grow; that the rush of technological innovation that's marked the last five hundred years can finally slow, and spread out to water the whole delta of human possibility. But those decisions will only emerge if people understand the time for what it is: the moment when we stand precariously on the sharp ridge between the human past and the posthuman future, the moment when meaning might evaporate in a tangle of genes or chips.

p. 198 - Enough: Staying Human in an Engineered Age (2003)