In Shakespeare's Macbeth, Macbeth showed this throughout the entire play.
The proverbial saying 'power corrupts; absolute power corrupts absolutely' conveys the opinion that, as a person's power increases, their moral sense diminishes.
"Absolute power corrupts absolutely" is the best known quotation of the 19th century British politician Lord Acton.
Primary amongst them was another English politician with no shortage of names - Whether it is Lamartine or his anonymous English translator who can claim to have coined 'absolute power corrupts' we can't be sure, but we can be sure that it came before Lord Acton's more famous version.
Whether Acton was aware of Lamartine's essay we can't now tell.