It's hard to pick a favorite because they are all good. But if I had to pick, it would be:
Some things in life can never be fully appreciated nor understood unless experienced firsthand.
As we grow comfortable behind garden walls, clutching gadgets like lifelines and ideologies like shields, empathy is the true social network.
Network Working Group R. Callon, Editor Request for Comments: 1925 IOOF Category: Informational 1 April 1996 The Twelve Networking Truths