“Take note of your thoughts. Don’t you see that they occupy the greatest part of your existence… Then see that your thoughts are all goodness and indulgence; see that they be full of loving enthusiasm for My cause. You are free to control them, and it is your duty to choose Me.” -Jesus to Gabrielle Bossis, He & I
Jesus also mentions to Gabrielle, that thoughts eventually become words and deeds.
Therefore, dear Princess of God, it is important to take control of what you are thinking about and fill your mind with beautiful, pure, and positive things, that is to choose Jesus, who is all beauty, all purity, and all goodness.
The Bible exhorts us as well in Philippians 4:8 “Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.”
If you notice negative thoughts or distractions however, it is important not to get too upset but to simply dismiss them and replace them with positive ones. Over time, this will develop into a habit and a practice and you will naturally develop a beautiful mind, united to Jesus.
The quality of your life is impacted greatly by the quality of the thoughts you have.
You may not be in the habit of thinking exceptionally worthy thoughts, but you can develop this habit, also by feeding your mind with good and wholesome material, such as meditating on Scriptures at the beginning of each day, reading good and wholesome Catholic books, such as the lives of the Saints, and rejecting unwholesome media such as TV and movies that will lead to negative or unworthy thoughts. What you put in is often what will start to come out, so a large part of training yourself to control your thoughts and choose Jesus is to put more “Jesus” in through the materials you consume.