What people call insincerity is simply a method by which we can multiply our personalities.

Oscar Wilde

It is a mark of insincerity of purpose to spend one's time in looking for the sacred Emperor in the low-class tea shops.

Ernest Bramah

The great enemy of clear language is insincerity.

George Orwell

Marriage always demands the finest arts of insincerity possible between two human beings.

Vicki Baum