George Washington (1732-1799), was the 1st U.S. President. George Washington once said:

"It is impossible to rightly govern a nation without God and the Bible."

Reference: America's God & Country Encyclopedia of Quotations, by William J. Federer, Page 660.

John Adams (October 30 1735 – July 4, 1826) was the second U.S President .

“We recognize no sovereign but God, and no king but Jesus!”

Reference: http://www.faithofourfathers.net/johnadams.html

On Friday, March 4, 1853, Franklin Pierce became the fourteenth U.S. President

who affirmed, rather than swore to, the oath of office.

Note: The Holy Bible prohibits the swearing of oath in that;

Jesus Christ said,

"Again, you have heard that it was said to the people long ago,

'Do not break your oath,

but keep the oaths you have made to the Lord.

"But I tell you,

Do not swear at all:

either by heaven, for it is God's throne;

or by the earth, for it is his footstool;

or by Jerusalem, for it is the city of the Great King.

And do not swear by your head, for you cannot make even one hair white or black.

Simply let your 'Yes' be 'Yes,'

and your 'No,' 'No';

anything beyond this comes from the evil one.

(Matthew 5:33-37).

Reference Source: https://en.wikipedia.org/wiki/Affirmation_in_law

Abraham Lincoln (1809-1865), was the 16th U.S. President.

"I can see how it might be possible for a man to look down upon the earth and be an atheist, But I cannot conceive how he could look up into the heavens and say there is no God,"

--[Abraham Lincoln].

Reference: http://thinkexist.com/quotation/i_can_see_how_it_might_be_possible_for_a_man_to/251292.html

Theodore Roosevelt (1858-1919), was the 26th President of the United States (1901-1909) and a Harvard graduate (Class of 1880).

Roosevelt expressed high value in Scripture. He said:

"A thorough knowledge of the Bible is worth more than a college education."

Reference: America's God & Country Encyclopedia of Quotations, by William J. Federer, Page 539-540.

Woodrow Wilson (1856-1924), was the 28th U.S.President.

President Woodrow Wilson remarked:

"A man had deprived himself of the best there is in the world who has deprived himself of this, a knowledge of the Bible. When you have read the Bible, you will know it is the Word of God, because you will have found it the key to your heart, your own happiness and your own duty."

Reference: America's God & Country Encyclopedia of Quotations, by William J. Federer, Page 697.