“The cheerful mind perseveres and the strong mind hews its way through a thousand difficulties.”
“Effort is the unconstrained willingness to persevere through difficulty.”
“Suffering becomes beautiful when anyone bears great calamities with cheerfulness, not through insensibility but through greatness of mind.”
“Great difficulties may be surmounted by patience and perseverance.”
“The female mind is capable of understanding analytic geometry... The difficulty may just be that we have never yet discovered a way to communicate with the female mind. If it is done in the right way, you may be able to get something out of it.”
“The habits of a vigorous mind are born in contending with difficulties.”