It is very difficult to evolve by altering the deep fabric of life; any change there is likely to be lethal. But fundamental change can be accomplished by the addition of new systems on top of old ones… Thus evolution by addition and the functional preservation of the preexisting structure must occur for one of two reasons-either the old function is required as well as the new one, or there is no way of bypassing the old system that is consistent with survival. Carl Sagan
Some Similar Quotes
  1. Fall, sweetheart. I'll catch you. - Shelly Crane
  2. You don't appreciate the things that come easy. The things we fight for are the things we keep with us forever. - Shelly Crane
  3. He leaned in close and spoke low. "Wow, I don't know what the hell I did to put that look on your face, but you need to write it down so I can commit it to memory. - Shelly Crane
  4. Love is not an equation, it is not a contract, and it is not a happy ending. Love is the slate under the chalk, the ground that buildings rise, and the oxygen in the air. It is the place you come back to, no matter... - Jodi Picoult
  5. True love is felonious… You take someone’s breath away… You rob them of the ability to utter a single word… You steal a heart. - Jodi Picoult
More Quotes By Carl Sagan
  1. It is very difficult for a man to allow his heart to walk around outside of his body. He wants to protect it at every moment.
Related Topics