Looking for the Context Surrounding This St. Robert Bellarmine Quote

This quotation attributed to St. Robert Bellarmine: >"It is granted to few to recognize the true Church amid the darkness of so many schisms and heresies, and to fewer still so to love the truth which they have seen as to fly to its embrace." is perhaps, well-known; but I would like to ascertain the context in which it was given---to see if it relates to some sort of a great apostasy, the end times, or something else. Does anyone know the origin of the above quotation so that I may read the context surrounding it? Preferably an online source in French or English; but Latin OK.