Hoyt & Roberts, comps. Hoyt’s New Cyclopedia of Practical Quotations. 1922.

Sincerity

Loss of sincerity is loss of vital power.
Bovee—Summaries of Thought. Sincerity.

Of all the evil spirits abroad at this hour in the world, insincerity is the most dangerous.
Froude—Short Studies on Great Subjects. Education.

Sincerity is impossible, unless it pervade the whole being, and the pretence of it saps the very foundation of character.
Lowell—Essay on Pope.

There is no greater delight than to be conscious of sincerity on self-examination.
Mencius—Works. Bk. VII. Ch. IV.

Bashful sincerity and comely love.
Much Ado About Nothing. Act IV. Sc. 1. L. 55.

Men should be what they seem;
Or those that be not, would they might seem none!
Othello. Act III. Sc. 3. L. 126.

A little sincerity is a dangerous thing, and a great deal of it is absolutely fatal.
Oscar Wilde—The Critic as Artist. Pt. I.