I have not stated it in terms of "object" directly but have always maintained that faith comes from the word ergo, the object of faith is Christ and Christ alone. The word is "alive and active" Heb.4:12 It's the word in the believer that effects God's will unto salvation and sanctification.
If you believe something, it might sound right, but if it is not true, your will not grow, you will not overcome. It is how believers can grieve and quench the Spirit hence, fall from grace, walking after the flesh instead. They have not lost their salvation (become spiritually dead again) but they have lost their momentum to overcome which, is our sanctification, our growing to the full stature of Jesus Christ.
This is why I describe believing and faith as being different, as evidenced by the disagreements amongst believers. It is obvious we can believe different things yet all have faith.
Be it unto you according to your faith Matt.9:29 Each of us here at least have the measure of faith that comes from the Gospel hence, we are saved. How much that faith grows throughout our walk with the Lord? Well, we will see when when we are evaluated, then the wood, hay and stubble will be burned away and we are left only with faith.