Lie
A lie is the deliberate fabrication or misrepresentation of the truth.
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Lie by Omission
A lie by omission is a statement in which everything that is said may be factually true, but that is still deceptive because material information is omitted.[1] For example, if a murderer who stabbed his victim denies his crime by saying he "did not shoot the victim", then this is technically truthful, because he stabbed the victim. However, it implies that he did not kill the victim, which is untrue.
Lying in Religion
Lying is prohibited by God in the Ten Commandments; Revelation 21:8 states that all liars will go to Hell. Satan is described in many religions as the Father of Lies. By contrast, the Bible says that God does not lie (Numbers 23:19, Titus 1:2).
Lying in Buddhism
In Buddhist morality, the Five Precepts, which are required to receive as a formal oath or vow in order to be a Buddhist (unlike many liberals who call themselves Buddhists while ignoring morality), specifically forbid lying in the Fourth Precept which also forbids gossip or "divisive speech", lewd or lascivious speech (profanity) and harsh speech.
Leo Tolstoy on lying to oneself and its consequences on one's ability to discern truth