Who said “One can never pay in gratitude; one can only pay ''in kind'' somewhere else in life.”?

“The public have neither shame or gratitude.”

“Revenge is profitable, gratitude is expensive.”

“Gratitude is one of the least articulate of the emotions, especially when it is deep.”

“... maybe the only thing worse than having to give gratitude constantly all the time, is having to accept it.”

“If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man.”

“The wave of the future is coming and there is no fighting it.”

“When one is a stranger to oneself then one is estranged from others too.”

“Good communication is as stimulating as black coffee, and just as hard to sleep after.”

“Only in growth, reform, and change, paradoxically enough, is true security to be found.”

“By and large, mothers and housewives are the only workers who do not have regular time off. They are the great vacationless class.”

“One cannot collect all the beautiful shells on the beach. One can collect only a few and they are more beautiful if they are a few.”