Proverbs 4:23-27 NIV
Above all else, guard your heart,
for everything you do flows from it.
Keep your mouth free of perversity;
keep corrupt talk far from your lips.
Let your eyes look straight ahead;
fix your gaze directly before you.
Give careful thought to the paths for your feet
and be steadfast in all your ways.
Do not turn to the right or the left;
keep your foot from evil.
NIV: New International Version