Whether you know it or not. That, essentially, is the Lutheran theology concept of Objective Justification - that one can come to the believe the Truth - not create it.
For example, Christ took away the sins of the world at the Cross. Whether that is known or not, or believed or not, does not change that accomplishment as a True Fact - a Truth to be believed or, simply, known when ‘seen’.
Faith is subjective by nature and does not represent Truth fully - nor can it be expected to on this side of the veil. Faith in one’s faith, then, is a common error as it replaces faith in God’s grace - the object of faith.
"I believe it - therefore, I make it true.’ Is flawed thinking at it’s worst. It’s like saying, God’s grace doesn’t exist unless I believe it or ‘manufacture’ it - the problem with that thinking should be apparent.
BA thinks that it is his faith that saves him. But it’s always been, and forever will be, God’s grace that saves us.