Un sot trouve toujours un plus sot qui l'admire.

A fool always finds a greater fool to admire him.

You see, but you do not observe

No man burdens his mind with small matters unless he has some very good reason for doing so.

To a great mind, nothing is little,' remarked Holmes, sententiously.

Crime is common. Logic is rare. Therefore it is upon the logic rather than upon the crime that you should dwell.

Education never ends, Watson. It is a series of lessons, with the greatest for the last.