The following is a cryptogram, a code in which each letter has been systematically and consistently replaced by another. Can you crack the code?
K DRQA MKIAL RXO MKIAL JG NIRES GCKAXOL. BDAZ EJFA BJ FZ DJFA, K FRCCZ BDAF, BDAZ WLA FZ NRBDCJJF.
Bonus points if you can name the source and the context.