Here are 3 different sayings encoded using the same code:
SFTEJPL EJQSZNQHZS'P MSZYGZXJFT YESN.
-- PSNF G'VNPSD GF M. T. CGBSLGHPS
ESQ XS QNRS DGH N WHQQGF-LGES EGCSZ.
-- CJEEJNX PLNRSPMSNZS, "EGKS'P ENWGHZ'P EGPQ"
SAQZSXS YSNZ VNF FSJQLSZ YJTLQ FGZ YED.
-- CJEEJNX PLNRSPMSNZS, "QLS ZNMS GY EHVZSVS"
I give up!