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.
Every citizen who stops smoking, or loses a few pounds, or starts managing his chronic disease with real diligence, is caulking a crack for the benefit of us all.
Diligence is the mother of good fortune, and idleness, its opposite, never brought a man to the goal of any of his best wishes.
Learning is not attained by chance, it must be sought for with ardor and diligence.