The Medrash (Tanchuma, Korach, 11) states, that after the debacle with Korach his children repented. They exclaimed: “Moshe is true, his Torah is true, and we are deceitful.”
Chassidim would explain that their statement, “Moshe is true and his Torah is true,” was also not said truthfully and with full awareness. Since by their very nature they were “deceitful,” even the true things that they said were only stated externally and as lip service.
This is called a “false truth.” One says the truth, but doesn’t truly feel the truth in it.
(R. Mendel, Pg. 268)
