Ten Years Later: The Man in The Iron Mask by Alexandre Dumas Chapter 10 Page 21

“I say that you render me happy and proud, for no other reason than that of having comprehended you thoroughly. Monsieur d’Herblay, you shall be cardinal, and when cardinal, my prime minister; and then you will point out to me the necessary steps to be taken to secure your election as pope, and I will take them.

You can ask what guarantees from me you please.”

“It is useless. Never shall I act except in such a manner that you will be the gainer; I shall never ascend the ladder of fortune, fame, or position, until I have first seen you placed upon the round of the ladder immediately above me; I shall always hold myself sufficiently aloof from you to escape incurring your jealousy, sufficiently near to sustain your personal advantage and to watch over your