The spontaneity of slaps is sincerity, whereas the ceremonial of caresses is largely convention.

No one means all he says, and yet very few say all they mean.

Men are always sincere. They change sincerities, that's all.

I should say sincerity, a deep, great, genuine sincerity, is the first characteristic of all men in any way heroic.

A friend is a person with whom I may be sincere. Before him I may think aloud.

Nature forever puts a premium on reality. What is done for effect is seen to be done for effect; what is done for love is felt to be done for love. A man inspires affection and honor because he was not lying in wait for these.

Sincerity is the highest compliment you can pay.

Be as you would seem to be.

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

Sincerity that thinks it is the sole possessor of the truth is a deadlier sin than hypocrisy, which knows better.