Muscatine

“I regard it (the Constitution) as the work of the purest patriots and wisest statesman that ever existed, aided by the smiles of a benign Providence; it almost appears a "Divine interposition in our behalf... the hand that destroys our Constitution rends our Union asunder forever.” 
??•    Daniel Webster

It's doubful he ever said this.   Nobody else has found it.

Other Jefferson quotes on the topic of the right to bear arms:

(with their origin referenced):

"On every question of construction (of the Constitution) let us carry
ourselves back to the time when the Constitution was adopted, recollect the
spirit manifested in the debates, and instead of trying what meaning may be
squeezed out of the text, or invented against it, conform to the probable one in
which it was passed." (Thomas Jefferson, letter to William Johnson, June 12,
1823, The Complete Jefferson, p. 322)

"No Free man shall ever be debarred the use of arms." (Thomas Jefferson,
Proposal to Virginia Constitution, 1 T. Jefferson Papers, 334,[C.J. Boyd, Ed.,
1950] )

"And what country can preserve its liberties, if its rulers are not warned
from time to time that this people preserve the spirit of resistance? Let them
take arms.... The tree of liberty must be refreshed from time to time, with the
blood of patriots and tyrants." (Thomas Jefferson in a letter to William S.
Smith in 1787. Taken from Jefferson, On Democracy 20, S. Padover ed., 1939)

"A strong body makes the mind strong. As to the species of exercises, I
advise the gun. While this gives moderate exercise to the body, it gives
boldness, enterprise, and independence to the mind. Games played with the ball,
and others of that nature, are too violent for the body and stamp no character
on the mind. Let your gun therefore be the constant companion of your walks.
(Thomas Jefferson, Encyclopedia of T. Jefferson, 318 [Foley, Ed., reissued
1967]; Thomas Jefferson to Peter Carr, 1785. The Writings of Thomas Jefferson,
[Memorial Edition] Lipscomb and Bergh, editors)

"What country can preserve its liberties if their rulers are not warned from
time to time that their people preserve the spirit of resistance. Let them take
arms." (Thomas Jefferson to James Madison, Dec. 20, 1787, in Papers of
Jefferson, ed. Boyd et al.)

“Laws that forbid the carrying of arms...disarm only those who are neither
inclined nor determined to commit crimes.... Such laws make things worse for the assaulted and better for the assailants; they serve rather to encourage than to prevent homicides, for an unarmed man may be attacked with greater confidence than an armed man.” (Jefferson's "Commonplace Book," 1774-1776, quoting from On Crimes and Punishment, by criminologist Cesare Beccaria, 1764)

“We established however some, although not all, its [self-government]
important principles. The constitutions of most of our States assert, that all
power is inherent in the people; that they may exercise it by themselves, in all
cases to which they think themselves competent, (as in electing their
functionaries executive and legislative, and deciding by a jury of themselves,
in all judiciary cases in which any fact is involved,) or they may act by
representatives, freely and equally chosen; that it is their right and duty to
be at all times armed…” (Thomas Jefferson to John Cartwright, 1824. Memorial
Edition 16:45, Lipscomb and Bergh, editors)

And from an early 19th century visitor to the United States:

"To trust arms in the hands of the people at large has, in Europe, been
believed...to be an experiment fraught only with danger. Here by a long trial it
has been proved to be perfectly harmless...If the government be equitable; if it
be reasonable in its exactions; if proper attention be paid to the education of
children in knowledge and religion, few men will be disposed to use arms, unless
for their amusement, and for the defence of themselves and their country."
(Timothy Dwight, Travels in New England and NewYork [London 1823]

So, from the earliest times, it was recognized that weapons, themselves, did not promote violence - But the lack of "education in knowledge and religion" could.

I tell you now.   If guns are outlawed, only the government workers and outlaws will have guns.  If that is the case, I intend to be among the outlaws.