Tenor.

Sargent, Robert Louis Stevenson, 1887

The cruelest lies are often told in silence. A man may have sat in a room for hours and not opened his teeth, and yet come out of that room a disloyal friend or a vile calumniator. And how many loves have perished because, from pride, or spite, or diffidence, or that unmanly shame which withholds a man from daring to betray emotion, a lover, at the critical point of the relation, has but hung his head and held his tongue? And, again, a lie may be told by a truth, or a truth conveyed through a lie. Truth to facts is not always truth to sentiment; and part of the truth, as often happens in answer to a question, may be the foulest calumny. A fact may be an exception; but the feeling is the law, and it is that which you must neither garble nor belie. The whole tenor of a conversation is a part of the meaning of each separate statement; the beginning and the end define and travesty the intermediate conversation. You never speak to God; you address a fellow-man, full of his own tempers; and to tell truth, rightly understood, is not to state the true facts, but to convey a true impression; truth in spirit, not truth to letter, is the true veracity. To reconcile averted friends a Jesuitical discretion is often needful, not so much to gain a kind hearing as to communicate sober truth. 

Robert Louis Stevenson, from "Truth of Intercourse"