B.

“It's not whether you're right or wrong, but how much money you make when you're right and how much you lose when you're wrong.”
― George Soros

“Estar concentrado significa hacer en todo momento lo que sabes que tienes que hacer, no cambiar nunca tu plan, a menos que las circunstancias del peloteo o del juego cambien de un modo tan excepcional que justifiquen la aparición de una sorpresa. Pero en términos generales significa disciplina, significa contenerte cuando surge la tentación de jugártela. Luchar contra esa tentación significa tener la impaciencia o la frustración bajo control.”
― Rafael Nadal, Rafa, mi historia (Indicios no ficción)

“Poverty never spoils a good man, but prosperity often does. It’s easy to stand hard times, because that’s the only thing you can do, but in good times the fool-killer has to do night work.”
― George Lorimer, Letters From A Merchant To His Son: Letters From A Self-Made Merchant To His Son Classics, Letters From A Self-Made Merchant To His Son George Horace Lorimer Illustrated and Annotated

“Some salesmen think that selling is like eating—to satisfy an existing appetite; but a good salesman is like a good cook—he can create an appetite when the buyer isn't hungry.”
― George Lorimer, Letters from a Self-Made Merchant to His Son