diff --git a/chapter04/introduction.xml b/chapter04/introduction.xml
index c54c67f8c..e2ef6f0ba 100644
--- a/chapter04/introduction.xml
+++ b/chapter04/introduction.xml
@@ -12,11 +12,11 @@
 
   <para>In this chapter, we will perform a few additional tasks to prepare
   for building the temporary system. We will create a set of directories in
-  <filename class="directory">$LFS</filename> for the installation of the
-  temporary tools, add an unprivileged user to reduce risk,
+  <filename class="directory">$LFS</filename> (in which we will install the
+  temporary tools), add an unprivileged user,
   and create an appropriate build environment for that user. We will also
-  explain the unit of time we use to measure how long LFS packages take to
-  build, or <quote>SBUs</quote>, and give some information about package
+  explain the units of time (<quote>SBUs</quote>) we use to measure how
+  long it takes to build LFS packages, and provide some information about package
   test suites.</para>
 
 </sect1>