“The true hypocrite is the one who ceases to perceive his deception, the one who lies with sincerity.”
— Andre Gide

“Weak people cannot be sincere.”
— Francois de La Rochefoucauld

“Sincerity: if you can fake it, you’ve got it made.”
— Daniel Schorr (also attributed to George Burns and Groucho Marx.)

“If you’ve ever deceived the public to keep your job, you are a liar, plain and simple; if your job is to deceive the public while fully understanding you would not like someone lying to you in the same way, you are the worst form of liar and hypocrite. Yet millions who do this every day go home from work and believe themselves honest.”
— Steven Senjac

“The more money you make at your job, the bigger the lies you are expected to tell.”
— Anonymous

“Make the lie big, make it simple, keep saying it, and eventually they will believe it.”
— Adolf Hitler

“A lie repeated often enough becomes the truth.”
— Joseph Goebbels

“There is nothing so absurd that it cannot be believed as truth if repeated often enough.”
— William James

“What is earnest is not always true; on the contrary, error is often more earnest than truth.”
— Benjamin Disraeli

“Once a person accepts money or power to speak the truth, they will shortly cease speaking the truth, but they will readily convince themselves they are still honest.”
— Jayne Risareo

“The liar’s punishment is not in the least that he is not believed, but that he cannot believe anyone else.”
— George Bernard Shaw