How do you guard or protect something valuable? What do you do with it?
The heart is the most important part of us- especially if we say Jesus lives in us! We’re told to guard our hearts above all because from our hearts comes our lives. Everything we think, say and do is affected by what is in our hearts. So we need to pay careful attention to what we let in.
Ask God to purify your heart and focus on Him so that what comes from your heart is pleasing to Him.