Without this, how would anyone know which God you believe in?
It's not that you couldn't generate the Power of Faith, but it could easily be... poached. By a Deity—no, to be more precise these days, by another person!
After all, that's how the Knights of God first came to be...
And yet, the power they wielded was undeniably that of the Star God, which made things very interesting.
Unfortunately, Soron lacked the ability to complete this "very interesting" research himself. That was a job for his master, Isaac. Soron's goal was simply to see if he could develop a "Star Ceremony" suitable for a Goblin Slayer by studying the promotion ritual of the Star Knights.
Even more unfortunately, his research in this area had yielded few results.
His only notable achievement was a slight increase in the Star Ceremony's survival rate, which had earned him the gratitude of many Black Knights...
