diff --git a/ch04.asciidoc b/ch04.asciidoc
index 1c6a1b87..7eee4308 100644
--- a/ch04.asciidoc
+++ b/ch04.asciidoc
@@ -53,13 +53,6 @@ key that allows the private key to be used to generate signatures on
 messages. This signature can be validated against the public key without
 revealing the private key.
 
-When spending bitcoin, the current bitcoin owner presents her public key
-and a signature (different each time, but created from the same private
-key) in a transaction to spend those bitcoin. Through the presentation
-of the public key and signature, everyone in the Bitcoin network can
-verify and accept the transaction as valid, confirming that the person
-transferring the bitcoin owned them at the time of the transfer.
-
 [TIP]
 ====
 ((("keys and addresses", "overview of", "key pairs")))In most wallet