I liked this quotation from Muthukrishnan’s book on data streams:
As human beings, we perceive each instant of our life through an array of sensory observations (visual, aural, nervous, etc). However, over the course of our life, we manage to abstract and store only part of the observations, and function adequately even if we can not recall every detail of each instant of our lives. We are biological data stream processing machines.
Way to tie the study of theoretical computer science to understanding the human condition!