Maggie's Farm

Good example; however, that the quote is spurious is fairly obvious. The literary cadence is foreign to Washington, while the mode of thought is foreign to his philosophy. Here's an authentic example for comparison:

Washington's Farewell Address: This government, the offspring of our own choice, uninfluenced and unawed, adopted upon full investigation and mature deliberation, completely free in its principles, in the distribution of its powers, uniting security with energy, and containing within itself a provision for its own amendment, has a just claim to your confidence and your support. Respect for its authority, compliance with its laws, acquiescence in its measures, are duties enjoined by the fundamental maxims of true liberty.

James Madison helped draft the early version, Alexander Hamilton the later version. Historians agree they express Washington's views.

Morgan K Freeberg: The phrase "doesn't seem like something Washington would have said" has been rather recklessly proliferated in discussions about this particular quote.

Putting Romantic concepts into the mouth of George Washington is a dead-giveaway. (Think "The Modern Prometheus".) At the very least, it should give one pause. At that point, you can always look for an authoritative source, such as the professional historians at Mount Vernon, who have access to one of the largest collections of the papers and letters of George Washington.