
“Everything will be okay in the end. If it's not okay, it's not the end.”
Also found with the alternative spelling: Everything is okay in the end. If it's not okay, it's not the end
Found anonymously on Usenet in 2000 https://groups.google.com/forum/message/raw?msg=alt.support.divorce/gKiyfcAYreo/jjuc6KTu_NAJ. First known attribution to Lennon is from 2011 https://groups.google.com/forum/message/raw?msg=stow-ma-apple-barn/45MNk9KiGsY/vaq6pr8hgI0J.
Disputed
Variant: Everything is OK in the end. If it's not OK, it's not the end.