"A motorist wanted to reach home before a storm broke. He found himself in
unfamiliar territory, but believed he knew the right road home. But he
paused a moment to ask himself the very intelligent question, 'Is it
possible that I am self-deceived?' A check of a map corrected his route,
which led him home safely. Every human being on the road of life should ask
the supremely intelligent question, 'Is it possible that I am
self-deceived?'"
700 Inspiring Guides To A New Life, # 309