When a person sets out on what in a certain sense is the hard way of the tragic hero, many will be able to advise him; the one who goes faith’s narrow way, him no one can advise, no one can understand. Faith is a miracle, and yet no human being is excluded from it, for that which unites all human life is passion, and faith is a passion.

Kierkegaard: Fear and Trembling

More classical than modern in his definition of passion. The way of faith is travelled alone – alone before God.