The word that is heard perishes, but the letter that is written remains.

Everything passes, everything perishes, everything palls.

He dies twice who perishes by his own hand

And I beseech you, brethren, suffer the word of exhortation: for I have written a letter unto you in few words.

That things are changed, and that nothing really perishes, and that the sum of matter remains exactly the same, is sufficiently certain.

We never heard from them. They never responded to the letter.