The object of our thinking is in Him, not in our primacy of judgment. He is the object of our faith. In the Greek the same word is used which we find translated as for faith and belief. Believe in Him and we will be saved. We are saved by faith alone, not by works, lest any man should boast. Same word used in both cases.
How do you know that?(Faith comes first)
Because the Word of God tells us. That is why we study the Word of God, to know what He wants for us by what He reveals of Himself to us, all glorifying the Son.
Consider Hebrews 11.
Who says? You do? Who is "Him" and how do you know "Him?"
He is the object of our faith
Why?
Believe in Him and we will be saved.
Saved form what? And how do you know that? Why do you fele you needor deserve to be saved?
Because the Word of God tells us
How do yoyu know it's the word of God?