“Philosophy can tell us only this much: reality is a unity; to depart from it at a single point, therefore, is to depart from it in principle and thus to play with a lighted fuse. The bomb may not go off. The liar may blank out the power of his nemesis: that which is, and may get away with any given scheme; he may win the battle. But if such are the battles he is fighting, he has to lose the war.”
— Leonard Peikoff, “O.P.A.R.”, page 271.
To lie is to declare war on reality.
(A demonstration of a flame fougasse somewhere in Britain during World War II. )
“Honesty” is the refusal to fake reality, that is, to pretend the facts are different from what they really are. If rationality is commitment to reality, honesty is the rejection of unreality. The rational man recognizes that existence exists; the honest man, that only existence exists.