“To be credible, lies require a good memory, otherwise it is better to choose dignity always recounding the truth.”

Source: Middlesex

Variant: There are three sides to every story: yours, theirs, and the truth somewhere in the middle.
Source: Styxx

Source: The Vastalimi Gambit (2013), Chapter 4

Final address (1973)
Context: I address the youth, those who sang and gave us their joy and their spirit of struggle. I address the man of Chile, the worker, the farmer, the intellectual, those who will be persecuted, because in our country fascism has been already present for many hours — in terrorist attacks, blowing up the bridges, cutting the railroad tracks, destroying the oil and gas pipelines, in the face of the silence of those who had the obligation to act.
They were committed. History will judge them.
Surely, Radio Magallanes will be silenced, and the calm metal instrument of my voice will no longer reach you. It does not matter. You will continue hearing it. I will always be next to you. At least my memory will be that of a man of dignity who was loyal to his country.

Source: The Awakening

Quotes from Judge Judy cases, Dress, stand, speak properly
Source: http://www.youtube.com/user/JJMinisodes#p/u/7/hpLSM73I6ZM ("If you tell the truth, you don't have to remember anything" - Mark Twain)

Speaking as the Director of USIA, in testimony before a Congressional Committee (May 1963) http://pdaa.publicdiplomacy.org/?page_id=6
Context: American traditions and the American ethic require us to be truthful, but the most important reason is that truth is the best propaganda and lies are the worst. To be persuasive we must be believable; to be believable we must be credible; to be credible we must be truthful. It is as simple as that.