Who said "The world changes, and we must change with it."?

This quote is attributed to Gandalf.

The world changes, and we must change with it. - Gandalf

"The world changes, and we must change with it."

Gandalf

"All we have to decide is what to do with the time that is given us."

"Even the smallest person can change the course of the future."

"There is some good in this world, and it's worth fighting for."

"A wizard is never late, nor is he early. He arrives precisely when he means to."