Every achievement worth remembering is stained with the blood of diligence and scarred by the wounds of disappointment.
— Charles Swindoll

What we hope to do with ease, we must learn first to do with diligence.
— Samuel Johnson

Whatever you do, do with all your might. Work at it if necessary early and late, in season and out of season, not leaving a stone unturned, and never deferring for a single hour that which can be done just as well now.
— P.T. Barnum

The leading rule for the lawyer, as for the man of every other calling, is diligence. Leave nothing for tomorrow which can be done today.
— Abraham Lincoln

My father was a diligent worker who put in long hours and never missed a day of work. If he got a bad weather report, he’d ask my mother to drive him to the station the night before. He would sleep in one of the cars on his train, so he’d be ready to go in the morning.
— Jack Welch