Thomas Jefferson quote

"It is of great importance to set a resolution, not to be shaken, never to tell an untruth. There is no vice so mean, so pitiful, so contemptible; and he who permits himself to tell a lie once, finds it much easier to do it a second and a third time, till at length it becomes habitual; he tells lies without attending to it, and truths without the world's believing him." —Thomas Jefferson, letter to Peter Carr, 1785