Click on the following confirmation that William Casey actually did say what he said:
More recent and well-known is the one from current Secretary of State Mike Pompeo, because it is captured on video from CSPAN, saying from his time as CIA Directory that they had “entire training courses” on “lying, cheating, stealing”.
From the horses’ mouth. Of course he didn’t mention assassinations, coups-d’etat, mind control experiments, LSD, or the many other things that are long publicly known now. Career politicos have publicly long protested CIA machinations, but did a complete 180 degrees in 2016 with Russiagate, Ukrainegate, Spygate, and other “gates”.