We all might think that our thoughts are private business and no one else knows them. They are secret and we can indulge in them without recourse.
We must reconcile this assumption with the words of Solomon, "The Lord detests the thoughts of the wicked, but those of the pure are pleasing to him." (Proverbs 15:26) You see, our thoughts which we "thought" were exclusive to us are known of by God.
In the time of Noah, God revealed this about the thoughts of men. He said, "The Lord saw how great man's wickedness on the earth had become, and that every inclination of the thoughts of his heart was only evil all the time." (Genesis 6:5) Not just the actions of man, or the thoughts of man but "every inclination" toward a thought in his mind was known about by God.
We cannot hide our thoughts from God. They are the seeds that bring about our actions. They are the revealer of our character. So, knowing that God knows your thoughts, does that affect your thinking?
God is pleased with the thoughts of the pure, the righteous, because they praise Him. They think positively about the circumstances they are in and press forward seeking God's help. They listen to the voice of God and respond to it.Are you guarding your thoughts? Attentiveness to even an inclination of a thought is important to maintaining your purity. Paul said in his final words to the Philippians, "Whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things." (Philippians 4:8) Here is the way to evaluate your thoughts daily.