CH03::running a node: clarify benefits

- Move "don't need to rely on third parties" to the top of the list

- Add the privacy benefit of a full node

- Clarify that running a full node only makes the network more robust if
  you use it to verify your own wallet transactions

ch03.asciidoc

@@ -348,9 +348,9 @@ Bitcoin nodes have a direct and authoritative view of the Bitcoin
 blockchain, with a local copy of all the spendable bitcoins
 independently validated by their own system. By running a node, you
 don't have to rely on any third party to validate a transaction.
-Additionally, by running a Bitcoin node, you contribute to the Bitcoin
-network and help make it more
-robust.
+Additionally, by using a Bitcoin node to fully validate the transactions
+you receive to your wallet, you contribute to the Bitcoin network and
+help make it more robust.
 
 Running a node, however, requires downloading and processing over 500 GB
 of data initially and about 400 MB of Bitcoin transactions per day.
@@ -396,6 +396,12 @@ USD computer the size of a pack of cards).
 Why would you want to run a node? Here are some of the most common
 reasons:
 
+- If you do not want to rely on any third party to validate the
+  transactions you receive.
+
+- You do not want to disclose to third parties which transactions belong
+  to your wallet.
+
 - If you are developing bitcoin software and need to rely on a Bitcoin
   node for programmable (API) access to the network and blockchain.
 
@@ -403,14 +409,13 @@ reasons:
   according to bitcoin's consensus rules. Typically, bitcoin software
   companies run several nodes.
 
-- If you want to support bitcoin. Running a node makes the network more
-  robust and able to serve more wallets, more users, and more
-  transactions.
-
-- If you do not want to rely on any third party to process or validate
-  your transactions.
+- If you want to support bitcoin. Running a node that you use to
+  validate the transactions you receive to your wallet makes the network
+  more robust.
 
-If you're reading this book and interested in developing bitcoin software, you should be running your own node.
+If you're reading this book and interested in strong security, superior
+privacy, or developing bitcoin software, you should be running your own
+node.
 
 ==== Configuring the Bitcoin Core Node