Westchester, Penna. March 11th. 1805
Much Respected Sir
Knowing your predilection for all subjects which have any relation to, or influence over the welfare of man, I have presumed to obtrude the accompanying sheets upon your view—not in consequence of any thing important contained in them; but because a subject is touched upon which I conceive to have a much greater influence upon mankind, whether considered with respect to health, morals, or government, than they are generally aware of—and of which a philosophical knowledge, and judicious application of the principles, would in my opinion, tend much to promote the Happiness of the human race;—viz. the power of Habit. Another inducement to this intrusion upon your time and pursuits, although perhaps less pertinent, yet not less pleasing, is that I may declare with how much Respect and Esteem I am your sincere (tho’ unknown) Friend,
DLC: Papers of Thomas Jefferson.