Cryptoquote

Q R O X M T D U M H Y Z M Y O E M P D Z M F B V B L E H M B C M H , Q O E H M M G F P D Y O M Z I O R D H V B L ; Q O Q Y U Q O M F M U M H J Z B Y O D E M P D Z M B V B L N Y O D X Q Z F M V R ; Q O Q Y U Q O M F B Y B H P X J . - - K N F O Q P M V D N Q F G . E H B Y G M Q F

Instructions: Each letter in the puzzle is substituted for another. Type your guesses into the gray boxes above each letter.