The Doctor of the Church On the Difference Between Faith and Knowledge
In this quote Augustine, the 4th century bishop of Hippo (a man sometimes referred to as ‘Doctor of the Church’), provides some helpful insight on the difference between faith and knowledge…
That which is promised is at once great and is not seen; and so faith is aroused by which we believe what we do not see, so that we may attain to see what we believe. Whoever derides this faith, so as to think that he is not to believe in what he does not see, when that shall come which he did not believe, he is put to shame.
Faith is to believe what you do not see, or to trust words about a hidden thing which truly exists, though you cannot see it with your eyes. About the things that we see we have knowledge, and not faith.