Our thinking-
God will help us renew our minds. The Holy Soirit guides us to truth (
John 16:13). According to Scripture, our part is to take every thought captive -"casting down imaginations and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ," (
II Cor 10:5).
That means when we have thoughts that are not in line with Scripture, we immediately focus on God and Scripture, the truth, such as
"...I will never leave thee, nor forsake thee." (Heb 13:5)
"The Lord is near to all who call upon Him, to all who call upon Him sincerely
and in truth." (Psa 145:19)
"Know ye not that ye are the temple of God, and that the Spirit of God dwelleth in you?" (I Cor 3:16).
Also, "And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God." (Rom 12:2)
Encourage you to locate some favorite Scriptures and say them when needed.. Repeat this process as neccessary.