Re: take something upon something
Welcome to the forums.
Could you paste in a few sentences before this one? (Note that when you paste, you may need to add back in spaces that get left out in the cutting-and-pasting process.)
Usually when you "take [something] on faith" it means you have to accept it without proof.
The use of "upon" makes me question whether this was the intended meaning here -- or maybe "upon" is how that expression is used in other dialects.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.