Today people speak of their hearts as their emotional centers. They might say, “My mind tells me one thing, and my heart tells me another” or “I’m just listening to my heart.”
But be careful, because the Bible says, “The heart is deceitful above all things, and desperately wicked; who can know it?” (Jeremiah 17:9 ).
When we talk about the heart as believers, we’re talking not only about the emotional center but about the intellectual center as well.
So, to be “pure in heart” means that we’re pure in our inner core. It means being people of purity.
But is it even possible to be pure today? Just like we easily dismiss the word holy, we also could dismiss the word pure. But “pure in heart” can be translated “single in heart.” It means having a single focus in life. It means that you’re a focused person, focused on your relationship with God.