--- wp-blog-header.php
+++ wp-blog-header.php
@@ -9,10 +9,13 @@
 
 	$wp_did_header = true;
 
+	// Load the WordPress library.
 	require_once( dirname(__FILE__) . '/wp-load.php' );
 
+	// Set up the WordPress query.
 	wp();
 
+	// Load the theme template.
 	require_once( ABSPATH . WPINC . '/template-loader.php' );
 
 }