“When the truth cannot be clearly made out, what is false is increased through fear.”
IV, 10, 10.
Historiarum Alexandri Magni Macedonis Libri Qui Supersunt, Book IV
Original
Ubi explorari vera non possunt, falsa per metum augentur.
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Quintus Curtius Rufus 21
Roman historianRelated quotes
“The ego is the false self-born out of fear and defensiveness.”
Source: Anam Cara: A Book of Celtic Wisdom

“Increased knowledge clearly implies increased responsibility.”
Nobel Prize Autobiography, from Les Prix Nobel. The Nobel Prizes 1980, Editor Wilhelm Odelberg, (Nobel Foundation), Stockholm (1981).
Knowing Yourself: The True in the False (1996)

The Great Infidels (1881)
Context: All the martyrs in the history of the world are not sufficient to establish the correctness of an opinion. Martyrdom, as a rule, establishes the sincerity of the martyr, — never the correctness of his thought. Things are true or false in themselves. Truth cannot be affected by opinions; it cannot be changed, established, or affected by martyrdom. An error cannot be believed sincerely enough to make it a truth.