I have often thought, how much happier I should have been, if, instead of accepting of a command under such Circumstances I had taken my Musket upon my Shoulder & enterd the Ranks, or, if I could have justified the Measure to Posterity, & my own Conscience, had retir’d to the back Country, & lived in a Wig-wam.

George Washington, letter to Joseph Reed, January 14, 1776

We shou’d not, in imitation of some nations which have been celebrated for a false kind of patriotism, wish to aggrandize our own Republic at the expence of the freedom & happiness of the rest of mankind.

George Washington, from a draft of his first Inaugural Address, January, 1789

Remember, especially, that for the efficient management of your common interests, in a country so extensive as ours, a Government of as much vigour as is consistent with the perfect security of Liberty is indispensable. Liberty itself will find in such a Government, with powers properly distributed and adjusted, its surest Guardian.

George Washington, Farewell Address, September 19, 1796

We have abundant reason to rejoice that in this Land the light of truth and reason has triumphed over the power of bigotry and superstition, and that every person may here worship God according to the dictates of his own heart. In this enlightened Age and in this Land of equal liberty it is our boast, that a man’s religious tenets will not forfeit the protection of the Laws, nor deprive him of the right of attaining and holding the highest Offices that are known in the United States.

George Washington, letter to the Members of the New Church in Baltimore, January 27, 1793

It is really a strange thing that there should not be room enough in the world for men to live, without cutting one anothers throats.

George Washington, letter to Marquis de Lafayette, June 18, 1788

Tis idle to suppose that raw and undisciplined Men are fit to oppose regular Troops, and if they were, our present Military System is too expensive, for any funds except that of an Eastern Nabob; and in the Civil line instead of one head and director we have, or soon shall have, thirteen, which is as much a monster in politicks as it would be in the human form.

George Washington, letter to William Fitzhugh, October 22, 1780

I beg you will be persuaded that no one would be more zealous than myself to establish effectual barriers against the horrors of spiritual tyranny, and every species of religious persecution - For you, doubtless, remember that I have often expressed my sentiments, that every man, conducting himself as a good citizen, and being accountable to God alone for his religious opinions, ought to be protected in worshipping the Deity according to the dictates of his own conscience.

George Washington, letter to the United Baptist Churches in Virginia, May, 1789

Ignorance & design, are difficult to combat. Out of these proceed illiberality, improper jealousies, and a train of evils which oftentimes, in republican governments, must be sorely felt before they can be removed.

George Washington, letter to John Jay, May 18, 1786

"The bosom of America," he [Washington] declared a few months later, was "open to receive … the oppressed and persecuted of all Nations and Religions; whom we shall welcome to a participation of all our rights and privileges … if they are good workmen, they may be of Asia, Africa, or Europe. They may be Mohometans, Jews or Christians of any Sect, or they may be Atheists.

George Washington, quoted in Paul Boller’s George Washington and Religion

This is not as direct a source as I would like. I hope the quote is good, but I confess some doubts when I see Washington including atheists in it.

It is much to be wished (but I think a good deal to be doubted) that the States would adopt a liberal and proper line of Conduct for the Government of this Country. It should be founded in justice. prejudices, unreasonable jealousies, and narrow policy should be done away. competent powers for all general purposes should be vested in the Sovereignty of the United States, or Anarchy and Confusion will soon succeed.

George Washington, letter to John A. Washington, June 15, 1783