Your mind can throw you if you don’t get a hold of it. When one operates in mental assent, it agrees that the word of the Lord is so, but when pressure comes against that word, it gravitates back to the carnal way of thinking. Breaking free from mental assent, takes total commitment to the word of God. Once you make a quality decision to stay with the word, your mind will stop fighting and vacillating from your heart. Your heart will grieve if you continue to go back and forth from the promises. So true faith, is not mental assent, or mentally agreeing with the word. True faith takes that word down into the heart and your heart will keep your mind straight, as you fight the goof fight of faith.
New International Version
Now faith is confidence in what we hope for and assurance about what we do not see Hebrews 11:1