I, for one, want to see God someday. But is it even possible to truly be pure in heart? Can anyone consistently hold to this high standard? What exactly does Jesus mean in His sixth beatitude, “Blessed are the pure in heart”?
The Greek word for “pure” in Matthew 5:8 is katharos. It means to be “clean, blameless, unstained from guilt.” Interestingly, the word can refer specifically to that which is purified by fire or by pruning.
Got Questions does a great job summarizing this important topic. You may read it here: Blessed Are the Pure In Heart.