There are scriptures that clearly show how the heart and mind/conscience are one. There’s a scripture that talks about the heart being sprinkled clean from a wicked conscience, Hebrews 10:22. Our heart has a conscience, much like our minds where our thoughts form, or maybe our thoughts really form in our hearts. I think this is why the word of God urges us to put on the mind of Christ (1 Corinthians 2:16, Philippians 2:5). His mind is pure and Holy, set on things above and not on things of the earth. The only way to have a pure conscience is to put on the mind of Christ, that is the renewed mind that we’re supposed to be transformed by, so that we are not conformed to the pattern of this world, as mentioned in Romans 12:2.
One scripture says that, “a man thinketh in his heart, so is he” Proverbs 23:7. Another scripture says that, “A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh” Luke 6:45. These scriptures seems to be showing us that that both our thoughts and actions reveal the contents of our hearts. Usually thoughts of evil later produce actions that are evil, which end up revealing that person to be evil and it all started within the heart, with thoughts, imaginations.
This reminds me of the scripture to guard our hearts.”Above all else, guard your heart, for everything you do flows from it.” (Proverbs 4:23) I wondered to myself, how do we “guard our hearts”. This can be done by being careful what we set before our eyes and ears. For example, sexual images produce sexual thoughts. Being that we’re still in the world (though not of it), we may not be able to control what others do and how they present themselves, but we can control how we react to these things around us, this is a good way to guard our hearts and not set something before ourselves that will cause us to stumble. Many times what we see or hear can cause us to have thoughts sometimes good and sometimes bad, it all depends on our hearts.
The connection between the heart and mind I believe is one of the reasons why a person can become depressed and suicidal. Thoughts can effect a person’s behavior greatly, it can make you either joyful, sad, or angry. I realized this is why lies and deception can be so effective, these are direct attacks on the mind and ultimately the heart. One of the reasons why we are urged in the scriptures to gird up the loins of our minds and be sober (1 Peter 1:13), we have to guard our hearts/mind/conscience from the enemy infiltrating it with lies and evil thoughts leading us to do his will instead of God’s will. That’s why it’s so important to take every thought into captivity and make it obedient to Jesus Christ, 2 Corinthians 10:5.
Thanks be to God that He provides us with wisdom and help in these areas, all we need to do is simply pray and make our request know to Him. He is faithful and true and able to do abundantly more than we ask. (Ephesians 3:20-21). In my moments of weakness I realized it is best to pray to God for His perfect strength. It’s better than succumbing to the temptations that are in our minds. When we overcome temptation of any kind, whether sexual or the temptation to react to something in an angry violent manner, no matter what it is, God can help us find our way out of it, and when we overcome temptation, when we resist the enemy trying to attack our minds with wicked and perverse thoughts, it leaves such a great peace to know that we did what was right and acceptable before God. (1 Corinthians 10:13)