One of the things you must make up your mind to do in your walk with God is to take the Word of God as the only truth to live by

Your words have been strong and hard against Me, says the Lord. Yet you say, What have we spoken against You? (Malachi 3:13 AMPC).
One of the things you must make up your mind to do in your walk with God is to take the Word of God as the only truth to live by. Never question the integrity of the Word. Believe, accept, and affirm that you’re who God says you are, you have what He says you have, and can do what He says you can do, as stated in His Word.
For example, 1 Corinthians 3:21 says, “…all things are yours.” Now, that’s a sovereign declaration of Deity; don’t try to rationalize it! Affirm in agreement, “All things are mine! I’ll never be broke in this world!” Let that word from God give you a new mentality of superabundance, and unending prosperity. There’re Christians who appraise their lives on the basis of their personal experiences and speak against the Word. That you probably don’t have cash in your bank account doesn’t mean you’re broke. The source of your wealth is Christ Jesus; you’re plugged into a never-ending supply. Have this consciousness.
Make the power of the Gospel effective in your life by speaking God’s language: His Word. Some Christians have spoken “hard words” against God; they take sides against God by saying the wrong things. That’s what we read in our opening verse. Don’t say you’re sick just because you felt some symptoms in your body. The Word says concerning those who’re born again, “They shall not say, ‘I’m sick’”; that’s because healing is their birthright. Better than that, divine health is their nature; so they don’t even get sick. Hallelujah!
Affirm God’s Word. If God says you have something, don’t say you don’t have it. Someone says, “I received my healing, but the pain is still there”; to talk that way is to repudiate your healing. Accept what the Word says you have, and declare accordingly; keep it in your mouth, for that’s God’s recipe for success, consistent progress, and prosperity. .