“Advice is seldom welcome and those who want it the most always like it the least.”

“Polished brass will pass upon more people than rough gold.”

“Patience is a most necessary quality for business many a man would rather you heard his story than grant his request.”

“Without some dissimulation no business can be carried on at all.”

“You must look into people as well as at them.”

“Firmness of purpose is one of the most necessary sinews of character and one of the best instruments of success. Without it genius wastes its efforts in a maze of inconsistencies.”

“In my opinion, it was chiefly owing to their deep contemplation in their silent retreats in the days of youth that the old Indian orators acquired the habit of carefully arranging their thoughts.Th...”

“To talk well and eloquently is a very great art, but that an equally great one is to know the right moment to stop.”

“Joel Cairo: You always have a very smooth explanation ready.Sam Spade: What do you want me to do, learn to stutter?”