What is a code? Can you see through these verbal disguises?

1- Which death-bed remark was this?
IWXH  XH  CD  IXBT  UDG  BPZXCV  CTL  TCTBXTH
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2-If you believe in this, then you are not alone.
V  PHHS  UHHL  ND  COR  URDC  HQ
QENRISD,  COR  DVJR  CHSVX  VIS  QHE  RARE.
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3- These words were spoken by the leader of a great superpower.
NTIER  EWFRO  EOFAN  HEEDG  AYONT  NDTOD  WESTA
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4- Find the clues and you'll find the message.
TCHLI  USEIC  SLAUS  EECCL  RUEET
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5- What did the secret agent have to do when he got this set of instructions?
GOAT  HOOP  HARRISON  APE  LANE
TOMB  EATEN  NOSTRIL  IAN  BUY
THEN  AIM  OFFER  KNEE
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6- Crack the code to discover a saying by German poet Rainer Maria Rilke.
V XD FK MH JU WD FN PT VQ SK MH JU WD FR TE GN PQ
SD FU WD FQ SS UZ BJ LH JM OF HK MD FZ BU WD F
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7-Can you decode this spy's instructions?
ASSERT  GMTNAO  EIEEDD  NTAMAA  THLYRY
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8-A French scholar is puzzling over a verse he found scrawled on a nursery wall. Can you help him?
UN  PETIT  D'UN  PETIT  SA  TONDEUR  VOL,
UN  PETIT  D'UN  PETIT  A  DEGRE  TA  FOLLE
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9-What one-word secret message is contained here?
MOST  SEA  LIONS  ARE  VEGETARIAN.  WHY?
BECAUSE  THEY  LIKE  PEA  SOUP  FOR  TEA.
AND   THEY   USE  THEIR  LEFT  EYE  TO  SEE  IT.
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