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A golden retriever puppy yawns during an American Kennel Club news conference in New York in 2009. Reuters

You may be dog-tired this ruff Monday morning, but luckily, it's National Puppy Day. You're totally justified in paws-ing your work to look at puppy pictures and read quotes about the adorable animals. After all, dogs are man's best friend -- and for that, they definitely deserve a bit of extra love and celebration.

Read on:

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Puppies sit in kennel at a frontier guards' cynology center near Minsk, Belarus, in 2013. Reuters

“Petting, scratching and cuddling a dog could be as soothing to the mind and heart as deep meditation and almost as good for the soul as prayer.” -- Dean Koontz

“A dog reflects the family life. Whoever saw a frisky dog in a gloomy family, or a sad dog in a happy one? Snarling people have snarling dogs, dangerous people have dangerous ones.” -- Arthur Conan Doyle

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A boxer rests as a Dachshund pup approaches it in Sagua La Grande, Cuba, in 2009. Reuters

“The world would be a nicer place if everyone had the ability to love as unconditionally as a dog.” -- M.K. Clinton

"Why does watching a dog be a dog fill one with happiness?" -- Jonathan Safran Foer

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A long-coated male chihuahua named "Love-kun" with a heart-shaped pattern on his coat sleeps in Odate, Japan, in 2009. Reuters

"You can say any foolish thing to a dog, and the dog will give you a look that says, 'Wow, you're right! I never would've thought of that!'” -- Dave Barry

“To his dog, every man is Napoleon; hence the constant popularity of dogs.” -- Aldous Huxley

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A Belarussian border guard plays with a German Shepherd puppy at a frontier guards' cynology center near Minsk, Belarus, in 2013. Reuters

“Whoever said you can't buy happiness forgot little puppies.” -- Gene Hill

“Everything I know I learned from dogs.” -- Nora Roberts

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A French Bulldog puppy poses for a portrait at the American Kennel Club in New York in 2014. Reuters

“They never talk about themselves but listen to you while you talk about yourself, and keep up an appearance of being interested in the conversation." -- Jerome K. Jerome

“You can always trust a dog that likes peanut butter.” -- Kate DiCamillo

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Bo and Sunny, the Obama family's dogs, are pictured on the South Lawn of the White House in 2013. Reuters

"Dogs are not our whole life, but they make our lives whole." -- Roger Caras

“When an eighty-five pound mammal licks your tears away, then tries to sit on your lap, it's hard to feel sad.” -- Kristan Higgins

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A member of the King's Troop Royal Horse Artillery holds a puppy as he prepares to leave St. John's Wood Barracks in London in 2012. Reuters

"The face of a golden retriever feels like home.” -- David Rosenfelt

“Did you know that there are over 300 words for love in canine?” -- Gabrielle Zevin

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Three dogs play with a stick in a park in the autumn sunshine in Innsbruck, Austria, in 2005. Reuters

"My little dog -- a heartbeat at my feet." -- Edith Wharton

"Dogs laugh, but they laugh with their tails." -- Max Eastman

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A litter of three-week-old tea cup poodle puppies sit in a mug cup and a food and water bowl at a Tokyo pet shop in 2003. Reuters

"A dog teaches a boy fidelity, perseverance and to turn around three times before lying down." -- Robert Benchley

"The pug is living proof that God has a sense of humor." -- Margo Kaufman

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Two St. Bernard puppies play at an enclosure of the St. Bernard Dog Museum in the southwestern Swiss town of Martigny in 2011. Reuters

“The only creatures that are evolved enough to convey pure love are dogs and infants.” -- Johnny Depp

“If there are no dogs in heaven, then when I die, I want to go where they went.” -- Will Rogers

Quotes compiled from dogtime.com and Goodreads.