A little sincerity is a dangerous thing and a great deal of it is absolutely fatal.

I write about wounds the eternal treasons of life. It's not very funny but it's sincere. My commitment is to sincerity.

How can sincerity be a condition of friendship? A taste for truth at any cost is a passion which spares nothing.

A friend should be one in whose understanding and virtue we can equally confide and whose opinion we can value at once for its justness and its sincerity.

Fear is not in the habit of speaking truth when perfect sincerity is expected perfect freedom must be allowed nor has anyone who is apt to be angry when he hears the truth any cause to wonder that he does not hear it.

But I recognize no infallible authority even in special questions consequently whatever respect I may have for the honesty and the sincerity of such or such an individual I have no absolute faith in any person.

The essential element in personal magnetism is a consuming sincerity - an overwhelming faith in the importance of the work one has to do.

Men are convinced of your arguments your sincerity and the seriousness of your efforts only by your death.

We want deeper sincerity of motive a greater courage in speech and earnestness in action.

That's what show business is sincere insincerity.