The God of all creation, the One who spoke into existence everything we see and the things that we can't see, like the things that exist in the oceans that are just now being discovered, and the galaxies that are beyond the reach of man, this same God made man. Only man was not spoken into existence, God Himself, took the clay of the earth and created man and He blew into man His breath and man became a living being. See Genesis 1:26-27 and 2:7, 21-22.
Psalm 139:13-14,16; "For You formed my inward parts; You wove me in my mother's womb. I will give thanks to you for I am fearfully and wonderfully made; wonderful are Your works, and my soul knows it very well. Your eyes have seen my unformed substance; And in Your book were all written the days that were ordained for me. When as yet there was not one of them." We are fearfully and wonderfully made so advanced are we that doctors and scientists are still mostly in the dark about the brain, but God is not, for He designed it and He knows everything there is to know about it, that is why we need to listen to what He says regarding the brain.
Today's title verse gives us godly advice about what we allow to go into our brain!
We are not to fill it with hours and hours of internet surfing, or playing computer games, or catching up with all the gossip on sights like Facebook or worse, much worse! When we fill our minds with killing, even in a game, it has a very detrimental effect, pornography has ruined many a marriage, and corrupted peoples views about sex, gender, etc. Satan takes that which God designed to be holy and good and twists it into something vile, ugly and degrading. Endless TV will addict our minds to greed, because greed never has enough, we always want bigger, faster, flashier, and none of it ever satisfies because greed cannot be satisfied. TV is the window into the world system and its ways which are totally against God's ways that is why He warns us to be careful with what we fill our minds with.
James 4:4 AMP; "You are like unfaithful wives having illicit love affairs with the world and breaking your marriage vow to God! Do you not know that being the world's friend is being God's enemy? So whoever chooses to be a friend of the world takes his stand as an enemy of God." Luke 8:14 NLT; "The seeds that fell among the thorns represent those who hear the message, but all too quickly the message is crowded out by the cares and riches and pleasures of this life. And so they never grow into maturity."
So what do we fill our fearfully and wonderfully made brains with? Romans 12:2; "And do not be conformed to this world, but be transformed by the renewing of your mind, so that you may prove what the will of God is, that which is good and acceptable and perfect." John 17:17 NLT, Jesus praying to His Father for believers says; "Make them holy by Your truth; teach them Your Word, which is truth."
2 Timothy 3:16-17 NLT; "All Scripture is inspired by God and is useful to teach us what is true and to make us realize what is wrong in our lives. It corrects us when we are wrong and teaches us to do what is right. God uses it to prepare and equip His people to do every good work."
And finally listen to these words from Psalm 119:10-16; "With all my heart I have sought You; Do not let me wander from Your commandments. Your word I have treasured in my heart, That I may not sin against You. Blessed are You, O Lord; Teach me Your statutes. With my lips I have told of All the ordinances of Your mouth. I have rejoiced in the way of Your testimonies, As much as in all riches. I will meditate on Your precepts and regard Your ways. I shall delight in Your statutes; I shall not forget your word."