Your thoughts do not all originate with you.
You can be influenced by everything and everyone, including the enemy. Nonetheless, we are instructed to be aware of every thought and to exercise discipline in this area.
Not some thoughts- all thoughts!
"We are destroying sophisticated arguments and every exalted and proud thing that sets itself up against the [true] knowledge of God, and we are taking every thought and purpose captive to the obedience of Christ . . ."
II Corinthians 10:5 (Amplified Bible)
Most are unaware of their thoughts and dive into the emotions of the movie screen that is in the mind. This is a matter for much prayer, as it determines how life is lived.
The Soldier of The Cross must learn this. And we never arrive. It is an ongoing, daily discipline. What a blessing that we are not alone in this. We have the Indwelling Holy Spirit to bring to mind the Light of The Word.
Nothing of value comes without prayer.
Tell Him today, and make this part of your daily prayer life.
Tell Him aloud.
Then, look up and move on!