Faith comes first, and perhaps sometimes only, through our hearts, not through our minds.
Can we come to love through the intellect? Can our IQ "create" our emotions?
Faith is a spiritual gift, one of many. We might not have them all. We can ask for an increase of faith.
One of the most beautiful and passionate prayers in the bible is that of the father who asked healing for his son. He asked Jesus for faith, not for his own needs, but for the sake of his child:
"Lord I believe, help Thou mine unbelief".