Who said "The past cannot be changed, only learned from."?

This quote is attributed to Worf.

The past cannot be changed, only learned from. - Worf

"The past cannot be changed, only learned from."

Worf Time

"I am a Klingon warrior. It is my duty to face death with honor."

"Today is a good day to die."

"Success is not measured by how many battles you win, but by how you conduct yourself in the struggle."

"Family is everything to a Klingon. Without honor, there is no family."

"Time waits for no one."

"Time spent with loved ones is never wasted."

"I've been alive for a long time. Long enough to know that you can't trust anyone."

"The past always catches up with you."