Experience teaches, that men ...

Experience teaches, that men are often so much governed by what they are accustomed to see and practice, that the simplest and most obvious improvements . . . are adopted with hesitation, reluctance, and slow gradations.
Experience teaches, that men are often so much governed by what they are accustomed to see and practice, that the simplest and most obvious improvements . . . are adopted with hesitation, reluctance, and slow gradations.

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

If the representatives of the people betray their constituents, there is then no recourse left but in the exertion of that original right of self-defense which is paramount to all positive forms of government.
The best we can hope for concerning the people at large is that they be properly armed.
...that standing army can never be formidable (threatening) to the liberties of the people, while there is a large body of citizens, little if at all inferior to them in the use of arms.
This [a state militia system] appears to me the only substitute that can be devised for a standing army, and the best possible security against it, if it should exist.
What plan for the regulation of the militia may be pursued by the national government is impossible to be foreseen...The project of disciplining all the militia of the United States is as futile as it would be injurious if it were capable of being carried into execution... Little more can reasonably be aimed at with the respect to the people at large than to have them properly armed and equipped ; and in order to see that this be not neglected, it will be necessary to assemble them once or twice in the course of a year.