Indeed, we need not look back half a century to times which many now living remember well, and see the wonderful advances in the sciences and arts which have been made within that period. Some of these have rendered the elements themselves subservient to the purposes of man, have harnessed them to the yoke of his labors and effected the great blessings of moderating his own, of accomplishing what was beyond his feeble force, and extending the comforts of life to a much enlarged circle, to those who had before known its necessaries only.

All... natural rights may be abridged or modified in [their] exercise by law.

The contradictory experiments of chemists leave us at liberty to conclude what we please. My conclusion is, that art has not yet invented sufficient aids to enable such subtle bodies [air, light, &c.] to make a well-defined impression on organs as blunt as ours; that it is laudable to encourage investigation but to hold back conclusion.

It has also been a great solace to me, to believe that you are engaged in vindicating to posterity the course we have pursued for preserving to them, in all their purity, the blessings of self-government, which we had assisted too in acquiring for them. If ever the earth has beheld a system of administration conducted with a single and steadfast eye to the general interest and happiness of those committed to it, one which, protected by truth, can never know reproach, it is that to which our lives have been devoted.

I do love this people [the French] with all my heart, and think that with a better religion and a better form of government and their present governors their condition and country would be most enviable.

What is true of every member of the society, individually, is true of them all collectively; since the rights of the whole can be no more than the sum of the rights of the individuals.

We are the friends of liberty everywhere, but the guarrantors of only our own.