“It is dangerous to be sincere unless you are also stupid.”
George Bernard Shaw
“A little sincerity is a dangerous thing, and a great deal of it is absolutely fatal.”
Oscar Wilde
“You can be sincere and still be stupid.”
Charles F. Kettering
“Danger lies in the writer becoming the victim of his own exaggeration, losing the exact notion of sincerity, and in the end coming to despise truth itself as something too cold, too blunt for his purpose -- as, in fact, not good enough for his insistent emotion. From laughter and tears the descent is easy to sniveling and giggles.”
Joseph Conrad
“A friend is a person with whom I may be sincere. Before him I may think aloud.”
Ralph Waldo Emerson
“Any emotion, if it is sincere, is involuntary”
Mark Twain
“No Resolution of Repenting hereafter, can be sincere.”
Benjamin Franklin