"Being forced to work, and forced to do your best, will breed in you temperance and self-control, diligence and strength of will, cheerfulness and content, and a hundred virtues which the idle will never know."
"Diligence is the mother of good fortune, and idleness, its opposite, never brought a man to the goal of any of his best wishes."
~Miguel de Cervantes
"I never could have done what I have done without the habits of punctuality, order, and diligence, without the determination to concentrate myself on one subject at a time."
"If your determination is fixed, I do not counsel you to despair. Few things are impossible to diligence and skill. Great works are performed not by strength, but perseverance."