“Those who become drunk with power and have enriched themselves unlawfully while serving, will continue the same path, while they remain in power.”
2007
Related quotes

In a Democracy, Palestinian Lawmaker Khalida Jarrar Would Be Free (June 21, 2018)

“The power to tax is not the power to destroy while this Court sits.”
Panhandle Oil Co. v. Mississippi ex rel. Knox http://caselaw.lp.findlaw.com/cgi-bin/getcase.pl?friend=oyez&court=us&vol=277&invol=218, 277 U.S. 233 (1928).
1920s
Guest speech to the conference of the Fiji Labour Party, Lautoka, 30 July 2005

XIII. How things eternal are said to be made.
On the Gods and the Cosmos
Context: Those who believe in the destruction of the world, either deny the existence of the Gods, or, while admitting it, deny God's power.
Therefore he who makes all things by his own power makes all things subsist together with himself. And since his power is the greatest power he must needs be the maker not only of men and animals, but of Gods, men, and spirits. And the further removed the first God is from our nature, the more powers there must be between us and him. For all things that are very far apart have many intermediate points between them.

Between Parentheses. Essays, Articles, and Speeches, 1998–2003. ed. Ignacio Echevarría, trans. Natasha Wimmer (New York: New Directions, 2011 [2004]). 358.
Variant: Alternative translation: "Those who have power—even for a short time—know nothing about literature; they are solely interested in power. I can be a clown to my readers, if I damn well please, but never to the powerful." Interview with Mónica Maristain for Playboy (Mexican edition), "The Last Interview" (2003), 102, in: The Last Interview. trans. Sybil Perez (New York: Mellville House, 2009). 93-123

Source: What is to be Done? (1902), Chapter Three, Section E, Essential Works of Lenin (1966)