Faith is the substance of hope - of things hoped for and the evidence of things not seen. So if you can hope for it and imagine it and keep imagining and hoping and seeing yourself driving a new car or seeing yourself getting that job or seeing yourself excel seeing yourself help that person - that is faith.
However I wasn't very good at the sciences or didn't have a lot of help in the sciences or something but certainly didn't set science for my A level. And when I came to take my A levels I didn't get a good enough result to go to University.
