Well, you have to understand that the book of Revelations belongs to a whole body of apocalyptic literature generated in the second half of the first century, AD, not all of which is Christian. Also of key importance is the fact that the book is allegorical, which completely negates the notion that everything in the Bible is literally true, as allegory is not literal but figurative. It is designed to be interpreted and it is designed to be obscure. Who's the guy on the white horse? That's easy: and if you like horses, you're better off sticking with the Old Testament or ancient Greek literature, both of which are a lot more horsey than the Gospels.