Do You Have Too Many Layers?

"Salomon says in Proverbs 4:23, "Above all else, guard your heart, for it is the wellspring of life."

Do we try to use that verse to put up extra layers to protect our heart from hurt? To keep it from being damaged or broken? This could be because we've seen pain and hurt or unkindness in the past. We feel the need to protect ourselves because of something that has happened in the past. I don't believe this verse is given to us as an excuse to surround our heart with thick layers, making it impossible for others to reach. Or impossible for us to give fully....as far as guarding our hearts when getting to know others, I'm thinking I should trust in God's love and save the shields for when I need them." 

- An excerpt from Guard Your Heart From Evil Not Love by Heather from Balance With Purpose