The other way, of offering a man's self and the utmost service he is a… — Essays
SAPIR 861
The other way, of offering a man's self and the utmost service he is able to do, both to one party and the other, has still less of prudence in it than conscience. Does not he to whom you betray another, to whom you were as welcome as to himself, know that you will at another time do as much for him? He holds you for a villain; and in the meantime hears what you will say, gathers intelligence from you, and works his own ends out of your disloyalty; double-dealing men are useful for bringing in, but we must have a care they carry out as little as is possible.
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