Proverbs 4:20-27    New International Version (NIV)

20 My son, pay attention to what I say;
turn your ear to my words.
21 Do not let them out of your sight,
keep them within your heart;
22 for they are life to those who find them
and health to one’s whole body.
23 Above all else, guard your heart,
for everything you do flows from it.
24 Keep your mouth free of perversity;
keep corrupt talk far from your lips.
25 Let your eyes look straight ahead;
fix your gaze directly before you.
26 Give careful thought to the paths for your feet
and be steadfast in all your ways.
27 Do not turn to the right or the left;
keep your foot from evil.

Colossians 3:23-24    New International Version (NIV)

23 Whatever you do, work at it with all your heart, as working for the Lord, not for human masters, 24 since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving.