Arizona Senator John McCain had penned a farewell note prior to his death from a brain tumour over the weekend.

According to news reports, the letter was read out by his spokesperson Rick Davis in Arizona yesterday.

His daughter Meghan McCain had also posted the letter on Twitter, with the caption: “Please read my father's farewell letter to the country he loved so much.”

In the letter, McCain had thanked Americans for providing him with the opportunity to serve the nation.

McCain, 81, had been diagnosed with a brain tumour last year and had been undergoing treatment in Arizona.

However, he announced last week that he would stop treatment.

Below is his letter in full:

My fellow Americans, whom I have gratefully served for 60 years, and especially my fellow Arizonians, thank you for the privilege of serving you, and for the rewarding life that service in uniform and in public office has allowed me to lead.

I've tried to serve our country honourably. I've made mistakes but I hope my love for America will be weighed favourably against them. I’ve often observed that I am the luckiest person on earth. I feel that way even now, as I prepare for the end of my life.

I’ve loved my life, all of it. I’ve had experiences, adventures, friendships, enough for 10 satisfying lives, and I am so thankful. Like most people, I have regrets. But I would not trade a day of my life in good or bad times for the best day of anybody else's.

I owe this satisfaction to the love of my family. One man has never had a more loving wife or children he was prouder of than I am of mine.

And I owe it to America to be connected to America’s causes: Liberty, equal justice, and respect for the dignity of all people bring happiness more sublime than life’s fleeting pleasures.

Our identities and sense of worth were not circumscribed, but are enlarged by serving good causes bigger than ourselves.

Fellow Americans, that association has meant more to me than any other. I lived and died a proud American. We are citizens of the world’s greatest republic, a nation of ideals, not blood and soil.

We are blessed and are a blessing to humanity when we uphold and advance those ideals at home and in the world.

We have helped liberate more people from tyranny and poverty than ever before in history, and we have acquired great wealth and power in the progress.

We weaken our greatness when we confuse our patriotism with tribal rivalries that have sown resentment, and hatred and violence in all the corners of the globe.

We weaken it when we hide behind walls, rather than tear them down; when we doubt the power of our ideals, rather than trust them to be the great force for change they have always been.

We are 325 million opinionated, vociferous individuals. We argue and compete and sometimes even vilify each other in our raucous public debates. But we have always had so much more in common with each other than in disagreement.

If only we remember that and give each other the benefit of the presumption that we all love our country, we will get through these challenging times. We will come through them stronger than before, we always do.

Ten years ago I had the privilege to concede defeat in the election for president. I want to end my farewell to you with heartfelt faith in Americans that I felt so powerfully that evening. I feel it powerfully still.

Do not despair of our present difficulties. We believe always in the promise and greatness of America because nothing is inevitable here.

Americans never quit, we never surrender, we never hide from history. We make history.

Farewell fellow Americans, God bless you, and God bless America.