As my grandfather reached the end of his long and satisfying life, I sat by his bedside and asked him what advice he could give me to help me in my own. Unable to speak, he pointed to his bedside cabinet where I found this curious puzzle!
This made me smile. It was typical of my grandfather who loved language and riddles. It took me a while, but I finally solved the puzzle and decoded his message!
CAN YOU:
1. Tell me his final message
AND
2. Explain the cipher!
A clue (if you need it):
I asked my grandfather if he could give me a clue to the cipher, and he just held up 4 fingers. It helped me - perhaps that will help you too?
A second clue (if you need it):
I quickly figured out that my grandfather didn't mean the number 4. He was never much of a numbers man and much preferred riddles and wordplay.
A third clue (if you need it):
I realised that my wordsmith grandfather must have meant the word "for", and that decoding the message involves exchanging one letter for another. But which letters? Surely the images next to each letter are involved...
SO!
seem to be sort of separate from the other letters, I thought this might be a key. One can notice that, to go fromS
toO
one needs to go back 4 spots in the alphabet. Doing the same for the whole text yields something as (from top to bottom, first the left line and then the right line):OK! EJIK UEZNQGKS
. Doing the same 4 spots further in the alphabet yields the equally non-elusive:WS! MRQS CMHVYOSD
. Just reporting what seems like a dead end. $\endgroup$