Creating a daily habit of reading the Bible is really the only way to reach that point where the language and themes of the Bible can shape our minds and hearts. The prolem with most Bible devotionals is that they don't tend to teach us about the Bible. They focus on inspiration or practical applications. But afterwards you're not really left knowing your Bible any better.
These devotionals seek to work through the Bible in a year, pointing out key themes and sharing background information where relevant. This means they are longer than your typical devotional, but hopefully leaving you feeling like you know that passage a little better than when you started