“We are but pawns on a chessboard too large to see the edges ”
I remember hearing this in a TV show a few years back. I'm fairly certain it had a fantasy/medieval setting; my first guess was Tywin Lannister from Game of Thrones. But all my Google search results, even with lots of variations (e.g. pieces instead of pawns, end instead of edge) have turned up nothing.
I often remember hearing things that I actually read, so it's possible it's from a book.