C.N. Douglas, comp. Forty Thousand Quotations: Prose and Poetical. 1917.
Insincerity
Nothing is more disgraceful than insincerity.
Cicero.
It is a shameful and unseemly thing to think one thing and to speak another, but how odious to write one and to think another.
Seneca.
Insincerity in a man’s own heart must make all his enjoyments, all that concerns him, unreal; so that his whole life must seem like a merely dramatic representation.
Hawthorne.