It is dangerous to be sincere unless you are also stupid.
Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
Every man alone is sincere. At the entrance of a second person, hypocrisy begins
I am not sincere, even when I say I am not.
Only those who have learned the power of sincere and selfless contribution experience life's deepest joy: true fulfillment.
Weak people cannot be sincere.
Be sincere; be brief; be seated.
Never regret anything you have done with a sincere affection; nothing is lost that is born of the heart.
Always be sincere, even if you don't mean it.
Men are always sincere. They change sincerities, that's all.
No man can produce great things who is not thoroughly sincere in dealing with himself.
I only desire sincere relations with the worthiest of my acquaintance, that they may give me an opportunity once in a year to speak the truth.
A friend is a person with whom I may be sincere. Before him I may think aloud.
Any emotion, if it is sincere, is involuntary.
If you would win a man to your cause, first convince him that you are his sincere friend.
As long as there are people trying to play music in a sincere way, there will be Jazz.
The sincere friends of this world are as ship lights in the stormiest of nights.
Well, you know what they say in Hollywood - the most important thing is being sincere, even if you have to fake it.
A few heart-whole, sincere, and energetic men and women can do more in a year than a mob in a century.
It doesn't matter what you believe just so long as you're sincere.