• Matthew 6:22-24
  “The lamp of the body is the eye. If therefore your eye is good, your whole body will be full of light. But if your eye is bad, your whole body will be full of darkness. If therefore the light that is in you is darkness, how great is that darkness! “No one can serve two masters; for either he will hate the one and love the other, or else he will be loyal to the one and despise the other. You cannot serve God and mammon.
   

Related Scriptures

• Proverbs 4:23
  Keep your heart with all diligence,
  For out of it spring the issues of life.
  
   
• James 1:8
  he is a double-minded man, unstable in all his ways.
   
• James 4:8
  Draw near to God and He will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double-minded.
   
• Matthew 6:19-21
  “Do not lay up for yourselves treasures on earth, where moth and rust destroy and where thieves break in and steal; but lay up for yourselves treasures in heaven, where neither moth nor rust destroys and where thieves do not break in and steal. For where your treasure is, there your heart will be also.