"The just shall live by his faith." (Habakkuk 2: 4)
The just shall live by faith, not by right thinking.
Faith is about resting, not doing.
It's about knowing, yes, but also believing in His love for us:
Here's the full definition of God's love:
"Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins." (1 John 4: 10)
Now John invites us to know and believe on that love:
"And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.' (1 John 4: 16)
We have known and believe this love.
How can we know, yet not believe?
We may receive the word of God, and we accept what has been shared with us, but if we still feel that what Jesus did at the Cross is not enough, that we have to add something, whether in our thoughts or deeds or even in our feelings, then we are admitting by those same actions that we do not believe, or rather rest in the Finished Work of all that Jesus did for us at the Cross, and which He does on our behalf to this day.
We are not saved by right doing or even right thinking, as though our active thinking and pondering keeps in right standing before God.
We are saved when we believe in our heart and confess out of our mouth that Jesus is Lord, and that He was raised from the dead for our justification.
For me, I kept thinking that I had to think or feel a certain way in order to be "right with God".
Yet we are not saved by what we think. We are saved by believing that Christ did it all.
The warfare which rages in some men's minds can bring such bondage, as it did for me, and still does for many in the body of Christ.
Rest in this truth -- we are saved by grace, which we receive by faith.
We are saved by believing the truth, that in Christ we are pardoned from all sins, and through Him we receive life and that more abundantly!