The worst vice of a fanatic is his sincerity.

The worst vice of a fanatic is his sincerity.

To be persuasive we must be believable; to be believable we must be credible; credible we must be truthful.

To be persuasive we must be believable; to be believable we must be credible; credible we must be truthful.

Enthusiasm is the genius of sincerity and truth accomplishes no victories without it.

Enthusiasm is the genius of sincerity and truth accomplishes no victories without it.

The secret of success is sincerity. Once you can fake that, you've got it made.

The secret of success is sincerity. Once you can fake that, you've got it made.

I am not sincere, even when I say I am not.

I am not sincere, even when I say I am not.

Sincerity makes the very least person to be of more value than the most talented hypocrite.

Sincerity makes the very least person to be of more value than the most talented hypocrite.

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

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

What is uttered from the heart alone, Will win the hearts of others to your own.

What is uttered from the heart alone, Will win the hearts of others to your own.

The egoism which enters into our theories does not affect their sincerity; rather, the more our egoism is satisfied, the read more

The egoism which enters into our theories does not affect their sincerity; rather, the more our egoism is satisfied, the more robust is our belief.