• WordNet 3.6
    • adj diligent characterized by care and perseverance in carrying out tasks "a diligent detective investigates all clues","a diligent search of the files"
    • adj diligent quietly and steadily persevering especially in detail or exactness "a diligent (or patient) worker","with persevering (or patient) industry she revived the failing business"
    • ***
Webster's Revised Unabridged Dictionary
    • Diligent Interestedly and perseveringly attentive; steady and earnest in application to a subject or pursuit; assiduous; industrious. "Seest thou a man diligent in his business? he shall stand before kings.""Diligent cultivation of elegant literature."
    • Diligent Prosecuted with careful attention and effort; careful; painstaking; not careless or negligent. "The judges shall make diligent inquisition."
    • ***
Century Dictionary and Cyclopedia
    • diligent Constant in study or effort to accomplish what is undertaken; attentive and persistent in doing anything; industrious; assiduous.
    • diligent Steadily applied; prosecuted with care and constant effort; careful; painstaking: as, make diligent search.
    • diligent Synonyms Active, sedulous, laborious, persevering, indefatigable, unremitting, untiring, painstaking.
    • diligent Diligently.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Diligent dil′i-jent steady and earnest in application: industrious
    • ***


  • Dag Hammarskjold
    “It is more noble to give yourself completely to one individual than to labor diligently for the salvation of the masses.”
  • Miguel De Cervantes
    “Diligence is the mother of good fortune, and idleness, its opposite, never brought a man to the goal of any of his best wishes.”
  • Benjamin Franklin
    “Diligence is the mother of good luck.”
  • William Shakespeare
    “That which ordinary men are fit for, I am qualified in. and the best of me is diligence.”
  • John Donne
    “I observe the physician with the same diligence as the disease.”
  • Samuel Johnson
    “What we hope ever to do with ease, we must learn first to do with diligence.”


Webster's Revised Unabridged Dictionary
F. diligent, L. diligens, -entis, p. pr. of diligere, dilectum, to esteem highly, prefer; di- = dis-, + legere, to choose. See Legend
Chambers's Twentieth Century Dictionary
Fr.,—diligens, -entis, pr.p. of L. diligĕre, to choose.


In literature:

At Fecamp a rusty ramshackle diligence awaited them.
"Septimus" by William J. Locke
It was however this field, that was cultivated most diligently.
"Historical View of the Languages and Literature of the Slavic Nations" by Therese Albertine Louise von Jacob Robinson
In conformity with this plan he ran riot on Sunday; but worked diligently during the rest of the week.
"A Handbook to the Works of Browning (6th ed.)" by Mrs. Sutherland Orr
I also heard the doctrines of Ninomiya: sincerity, diligence, moderate living, unselfishness.
"The Foundations of Japan" by J.W. Robertson Scott
Twist extracted out of him by diligent questioning.
"Christopher and Columbus" by Countess Elizabeth Von Arnim
The leading rule for a lawyer, as for the man of every other calling, is diligence.
"Speeches and Letters of Abraham Lincoln, 1832-1865" by Abraham Lincoln
At Jaspar's suggestion, a diligent search was made in every part of the boat, but the mulatto was nowhere to be found.
"Hatchie, the Guardian Slave; or, The Heiress of Bellevue" by Warren T. Ashton
Acre did not fall by the sword, but by starvation rather, and the diligent negotiations of Saladin with our King.
"The Life and Death of Richard Yea-and-Nay" by Maurice Hewlett
Lead me to what is right for me to do; and may I diligently tarry in it.
"Leaves of Life" by Margaret Bird Steinmetz
What remedy soever you can apply, what diligence soever you can make, all will be too little, and of the latest.
"The Works of John Dryden, Volume XVI. (of 18)" by John Dryden

In poetry:

"O do you imagine," said fearer to farer,
"That dusk will delay on your path to the pass,
Your diligent looking discover the lacking,
Your footsteps feel from granite to grass?"
"O Where Are You Going?" by W H Auden
You will not, I know, tell lies,
If you know what you are speaking.
Truth is shy, and from us flies;
Unless diligently seeking
Into every word we pry,
Falsehood will her place supply.
"Incorrect Speaking" by Charles Lamb
"Nor is it your proneness to domestication,
For he dwells in man's barn, and I build in man's thatch,
As we say to each other—but, to our vexation,
O'er your safety alone man keeps diligent watch."
"The Sparrow And The Hen" by Charles Lamb
Brown passed away, and Mrs Brown,
In weeds all smothered, went through town
By Brown's neat grave to take her stand,
And hold a metaphoric hand.
She diligently drove away
The sorrel springing every day.
"The Weeds" by Edward Dyson
Then merrily rose Dives and leaped from out his fire,
And walked abroad with diligence to do the Lord's desire;
And anon the battles ceased,
And the captives were released,
And Earth had rest from Goshen to Gadire.
"The Peace of Dives" by Rudyard Kipling
The lower he drops in the social scale,
Tho' jobs never cease, nor diligence fail, Worse paid is work ever found;
That varnish'd chair in the furniture sale
Yields only some pence to this journeyman pale,
—To his master the rest of the Pound!
"A Dozen Ballads About White Slavery. X. Slop-Jobbing" by Martin Farquhar Tupper

In news:

League of voters urges extra diligence in casting ballots.
Thwarted NYC Terrorist Attack Proves Need For "Constant Diligence ," Gov Andrew Cuomo Sez.
In no small part, the work of Mike Vogel, as economic development coordinator, along with Mayor Evans and the rest of the town staff deserve the sincere thanks of our community for their diligent work and perseverance.
Audit cites tax credit issues, Mamtek due diligence failure.
FTC cracks down on companies promising due diligence .
Break-in educates car owner in diligence .
What is a due diligence period.
I'm just glad he stayed diligent with his treatment.
Announced Monday that it has agreed to let founder and former chairman Richard Schulze conduct due diligence and form an investment group with private equity sponsors as he tries to take the retailer private.
Best Buy To Let Schulze's Bid Move Forward, Start Due Diligence .
Best Buy will allow founder Richard Schulze to conduct due diligence and form an investment group to make an official bid for the struggling retailer.
The United Illuminating Company (UI) announced Thursday it's preparing for Hurricane Sandy and is "diligently watching its path.".
Programs are popular, diligence translates to performance.
"The kids have been diligent and want to improve themselves along the way," he said.
The Coast Guard Cutter Diligence shipped out for another mission this afternoon.

In science:

In the slightly more distant future, the radio community is looking forward to, and many are working diligently toward, the full Square Kilometre Array (SKA), which is to be sited in either Australia or South Africa.
Panoramic Radio Astronomy
We are grateful to Stephenson Yang for his patience and diligence regarding computer and network maintenance.
The Multi-Epoch Nearby Cluster Survey: type Ia supernova rate measurement in z~0.1 clusters and the late-time delay time distribution
The central dogma of our approach can be phrased as follows: Consider a player who diligently executes (only) the delegated protocol but the adversary steals some private information from him.
A New Look at Composition of Authenticated Byzantine Generals
However, there can be faulty players wherein some of the processes continue to diligently execute the delegated protocol code.
A New Look at Composition of Authenticated Byzantine Generals
Should such processes be deemed faulty? The answer can be no since they diligently execute the delegated protocol, hence, they are certainly not Byzantine faulty.
A New Look at Composition of Authenticated Byzantine Generals