They say that a dog is a man's best friend, and they are completely correct. Dogs recognize our gestures, perceive our emotions, and reply with the most reassuring sentiments. Above all, it is their unconditional love for us, as well as their willingness to stay with us until their last breath, that distinguishes them as genuinely remarkable. They are the quiet watchers who know us better than anyone else, from seeing us do the most bizarre things to being present on our most difficult days.

Where it all began
The expression "Man's Best Friend" has been coined by King Frederick of Prussia in 1789.
“The only, absolute and best friend that a man has, in this selfish world, the only one that will not betray or deny him, is his DOG.”
When he uttered this statement, he was referring to his Italian Greyhound.

They are so much more than a pet.
Dogs may just be called Pets for some, but for others, they are more than their family members. Dogs have often demonstrated their loyalty, kindness, and compassion, as well as their indomitable spirit. They cheerfully meet us after what may have been the worst day of our life, and with a wag of their tail and a mischievous grin, they make us feel better. What more is needed in someone’s life better than a fur-ball waiting for you to come home and play with them. It just doesn’t release your stress but also gives you a healthy life. 
These are some cures a dog provides you just by staying beside you:
• links to a longer life span
• lower risk of cardiovascular disease
• reduce the adverse health effect of living alone
• can decrease allergies and asthma in children
• increase opportunities for health-beneficial socialization
Regardless of your anger, stress, depression, your dog will always be there for you, you can never feel lonely in their presence. 
Maybe there’s a person in your life to support you every day, and then there comes your dog who will be there through your thick and thin to listen to your talks and all the bad hours you have, that little furball will listen to everything. 
You know what the best part is, there won’t be any arguments. It’s just you who wanted a good listener in your life and now you are in paradise. Be it your struggle of life, relationship issues, boss issue, or any reason you are under stress, he’ll listen to all of them and respond with all his feelings.
Apart from loving you, they will protect you no matter what. You and your family will be safe from everything day and night. He will be loyal to every time no matter how bad you lash out at them, he will never complain. 
He will sense your bad mood and love you to endless. You just can’t ignore or get rid of them. They will come to you running if they need something or want to play. He will be familiar with your everyday routine, so you never have to remind him at what time what is needed to be done. There is no way that he will ever miss out your call.
Sometimes you might miss giving food or taking them out for a walk, that furball will never hold grudges against you. The next moment you call out his name, he will be running to you. 
You can love them whenever and wherever you want, ignoring the fact that what people will think or say. Just not that you can share your bed with and dream about heaven. The compassion and compatibility you have with your dog are unbeatable. 
Last but not the least, the life lesson a dog teaches to you that cannot be taught by any person or book. No matter what you are to any person’s life or what value you have for someone, for your dog, you will always be the First and Last priority till their last breath.