Who said "Virtue is its own reward."?

This quote is attributed to Dr. John Watson.

Virtue is its own reward. - Dr. John Watson

"Virtue is its own reward."

Dr. John Watson Kindness

Character in The Hound of the Baskervilles

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"I am not a very good subject for a novelist."

"The greatest happiness the greatest number."

"We are not beaten yet."

"Justice, however delayed, is not denied."

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."