Ten Years Later: The Man in The Iron Mask by Alexandre Dumas Chapter 14 Page 13

“In that case, my dear fellow,” returned the bishop, laughing, “the only thing now is, that the ‘opportunity’ has not yet arrived.”

D’Artagnan shook his head with a sorrowful expression. “Oh, friendship, friendship!” he said, “what an idle word you are! Here is a man who, if I were but to ask it, would suffer himself to be cut in pieces for my sake.”

“You are right,” said Aramis, nobly.

“And this man, who would shed every drop of blood in his veins for me, will not open up before me the least corner in his heart. Friendship, I repeat, is nothing but an unsubstantial shadow — a lure, like everything else in this bright, dazzling world.”