Thou hast proved mine heart; thou hast visited me in the night; thou hast tried me, and shalt find nothing; I am purposed that my mouth shall not transgress. Concerning the works of men, by the word of thy lips I have kept me from the paths of the destroyer. Psalms 17:3-4 KJV
Your words, when you speak the Word of God, establish your victory over the ememy of your soul. When God is for you, nothing can stand against you.
No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the Lord , and their righteousness is of me, saith the Lord . Isaiah 54:17 KJV
When the enemy causes people to attack you with judgemental words, you are to condemn those words by speaking what God says.
Only God’s Word is eternally immutable.