diff --git a/source/guide.html.haml b/source/guide.html.haml
index 541b2fc..009985a 100644
--- a/source/guide.html.haml
+++ b/source/guide.html.haml
@@ -60,7 +60,7 @@ title: Sass Basics
     :markdown
       ## Nesting
 
-      When you write HTML you've probably noticed that it has a fairly clear nested, visual hierarchy. CSS, on the other hand, isn't. Sass will let you nest your CSS selectors in a way that follows the same visual hierarchy of your HTML. Here's an example of some typical styles for a site's navigation:
+      When writing HTML you've probably noticed that it has a clear nested and visual hierarchy. CSS, on the other hand, doesn't. Sass will let you nest your CSS selectors in a way that follows the same visual hierarchy of your HTML. Here's an example of some typical styles for a site's navigation:
 
     %ul
       %li= link_to "SCSS", "#topic-3-SCSS"