Please help me solve

[stuartTheClairvoyant]

I came across the following

nrrg fvm zt xpyj mvd kzcr tvj zt xpyj mvd krj

with Source: Unattributed

It's been a long time since I could not solve a puzzle. Can someone tell the solution?

stuart, now "not so clairvoyant"

[gryhnd51]

some of your letters were mixed up....always recheck!! Pretty sure the quote is SEEK JOY BY WHAT YOU GIVE NOT BY WHAT YOU GET Next time try the chat room, as you'll likely get a faster response from someone willing to help you. Good luck!

[stuartTheClairvoyant]

Thank you.

The answer is actually "SEEK JOY IN WHAT YOU GIVE NOT IN WHAT YOU GET"

["BY" in reply should be "IN"]

The letters in the puzzle were correct.