Look out how you use proud words.
They wear long boots
They wear hard boots
They walk off proudly
They can't hear you calling,
Lookout how you use proud words.

Carl Sandburg

and

The moving finger writes
And, having writ moves on
Nor all your piety and wit can lure it back
to cancel half a line,
Nor all your tears wash out a word of it.

Omar Khayyam