diff --git a/analogies.md b/analogies.md
index 169eb27..edd3380 100644
--- a/analogies.md
+++ b/analogies.md
@@ -15,7 +15,8 @@ determined by a law or by a contractual arrangement.
 
 Similarly as a brain consists of cells, Bitcoin consists of nodes (computers).
 The functionality of the brain isn't located in any single cell, but in the
-cells working together. Bitcoin's nodes also work together to form Bitcoin.
+cells working together. Each node contains the exact copy of a consensus, like
+each cell contains a DNA.  Bitcoin's nodes also work together to form Bitcoin.
 
 ## Bitcoin is like a central bank
 
diff --git a/principles.md b/principles.md
index 83b28a0..128dc1a 100644
--- a/principles.md
+++ b/principles.md
@@ -71,6 +71,9 @@ Don't daytrade, you don't understand how trading works, you'll lose money.
 - selling may incur taxes
 - selling may create problems with banks
 
+https://www.calcalistech.com/ctech/articles/0,7340,L-3923405,00.html - Esther
+Freeman has no coins.
+
 - what to do instead?
 - do nothing
 - sell a small amount, whatever you urgently need