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A man is sometimes as different from himself as he is from others.

I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinions of himself than on the opinions of others.

In civilized life, where the happiness and indeed almost the existence of man, depends on the opinion of his fellow men. He is constantly acting a studied part.

Every man must have the right fearlessly to think independently and express his opinion about what he knows, what he has personally thought about and experienced, and not merely to express with slightly different variations the opinion which has been inculcated in him.

The happy man is not he who seems thus to others, but who seems thus to himself.

A man is literally what he thinks.

A man is but the product of his thoughts what he thinks, he becomes.

The most difficult secret for a man to keep is his own opinion of himself.

A man is what he thinks about all day long.

A man has as many social selves as there are individuals who recognize him.