What we learn to do, we learn by doing.

Honesty, disinterestedness and good nature are indispensable to procure the esteem and confidence of those with whom we live, and on whose esteem our happiness depends.

All the capital employed in paper speculation is barren and useless, producing, like that on a gaming table, no accession to itself, and is withdrawn from commerce and agriculture where it would have produced addition to the common mass It nourishes in our citizens habits of vice and idleness instead of industry and morality It has furnished effectual means of corrupting such a portion of the legislature as turns the balance between the honest voters whichever way it is directed.

And, in general, that branch which is to act ultimately and without appeal on any law is the rightful expositor of the validity of the law, uncontrolled by the opinions of the other coordinate authorities.

We must endeavor to forget our former love for them [the British] and to hold them, as we hold the rest of mankind, enemies in war, in peace friends.

We must not let our rulers load us with perpetual debt.

I am myself an empiric in natural philosophy, suffering my faith to go no further than my facts. I am pleased, however, to see the efforts of hypothetical speculation, because by the collisions of different hypotheses, truth may be elicited and science advanced in the end.