(Psalm 51:10 KJV) Create in me a clean heart, O God; and renew a right spirit within me.

(Proverbs 4:23 NLT) Guard your heart above all else, for it determines the course of your life.

(Ezekiel 33:6 NLT) But if the watchman sees the enemy coming and doesn’t sound the alarm to warn the people, he is responsible for their captivity...

(Psalm 119:9) How can a young man keep his way pure? By guarding it according to your word.