It is only a good, sound, truthful person who can lie to any good purpose; if a man is not habitually truthful his very lies will be false to him and betray him. The converse also is true; if a man is not a good, sound, honest, capable liar there is no truth in him.
 Samuel Butler, The Note-Books of Samuel Butler (1912). copy citation

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Author Samuel Butler
Source The Note-Books of Samuel Butler
Topic truth purpose
Date 1912
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/6173/6173-h/6173-h.htm

Context

“Truth consists not in never lying but in knowing when to lie and when not to do so. De minimis non curat veritas.
Yes, but what is a minimum? Sometimes a maximum is a minimum and sometimes it is the other way.
ii
Lying is like borrowing or appropriating in music. It is only a good, sound, truthful person who can lie to any good purpose; if a man is not habitually truthful his very lies will be false to him and betray him. The converse also is true; if a man is not a good, sound, honest, capable liar there is no truth in him.
iii
Any fool can tell the truth, but it requires a man of some sense to know how to lie well.
iv
I do not mind lying, but I hate inaccuracy.
v
A friend who cannot at a pinch remember a thing or two that never happened is as bad as one who does not know how to forget.” source