Who said "One should always think things out before one acts."?

This quote is attributed to Dr. John Watson.

One should always think things out before one acts. - Dr. John Watson

"One should always think things out before one acts."

Dr. John Watson Wisdom

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."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."