The following quotes are taken from several Presidential Thanksgiving Proclamations:

“Almighty God, who hast given us this good land for our heritage; We humbly beseech Thee that we may always prove ourselves a people mindful of Thy favor and glad to do Thy will.”
President Franklin D. Roosevelt, Nov. 9, 1940

“As the harvest season draws to a close and our storehouses bulge with the bounty of the land, it is our desire to observe, in the custom and tradition of our forebears, a special day dedicated to giving thanks to God – a day on which to lay aside our daily tasks and cares and pay joyous homage to Him.”
President Lyndon B. Johnson, Nov. 13, 1964

“And for our heritage – a land rich with the bountiful blessings of God, and the freedom to enjoy those rich blessings – we give thanks to God Almighty in this time, and for all time.”
President Richard Nixon, Nov. 25, 1971

“Perhaps no custom reveals our character as a Nation so clearly as our celebration of Thanksgiving Day. Rooted deeply in our Judeo-Christian heritage, the practice of offering thanksgiving underscores our unshakable belief in God as the foundation of our Nation and our firm reliance upon Him from Whom all blessings flow.”
President Ronald Reagan, Thanksgiving Day, 1986

“Sharing in God’s blessings is at the heart of Thanksgiving and at the core of the American spirit.”
President Bill Clinton, Nov. 17, 2000

“All across America, we gather this week with the people we love to give thanks to God for the blessings in our lives.”
President George W. Bush, Nov. 23, 2004

Read all Presidential Thanksgiving Proclamations at pilgrimhall.org