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142 , December 18, 1750.

U S P I C I O N, however necessary it may be to our safe passage through ways beset on all sides by fraud and malice, has been always considered, when it exceeds the common measures, as a token of depravity and corruption; and a Greek writer of sentences has laid down as a standing maxim, that he who believes not another on his oath, knows himself to be perjured.

We can form our opinions of that which we know not, only by placing it in comparison with something that we know; whoever therefore is over-run with suspicion, and detects artifice and stratagem in every proposal, must either have learned by experience or observation the wickedness of mankind, and been taught to avoid fraud by having often suffered or seen treachery, or he must derive his judgment from the consciousness of his own disposition, and impute to others the same inclinations, which he feels predominant in himself.

To learn caution by turning our eyes upon life, and observing the arts by which negligence is surprised, timidity overborne, and credulity amused, requires either great latitude of converse and long acquaintance with business, or uncommon activity of vigilance, and acuteness of penetration. When