“The true source of our sufferings has been our timidity.”

“Facts are stubborn things; and whatever may be our wishes, our inclinations, or the dictates of our passion, they cannot alter the state of facts and evidence.”

“It should be your care, therefore, and mine, to elevate the minds of our children and exalt their courage; to accelerate and animate their industry and activity; to excite in them an habitual contempt of meanness, abhorrence of injustice and inhumanity, and an ambition to excel in every capacity, faculty, and virtue. If we suffer their minds to grovel and creep in infancy, they will grovel all their lives.”

“...The Presidential election has given me less anxiety than I myself could have imagined. The next administration will be a troublesome one, to whomsoever it falls, and our John has been too much worn to contend much longer with conflicting factions. I call him our John, because, when you were at the Cul de sac at Paris, he appeared to me to be almost as much your boy as mine....As to the decision of your author, though I wish to see the book {Flourens’s Experiments on the functions of the nervous system in vertebrated animals}, I look upon it as a mere game at push-pin. Incision-knives will never discover the distinction between matter and spirit, or whether there is any or not. That there is an active principle of power in the universe, is apparent; but in what substance that active principle resides, is past our investigation. The faculties of our understanding are not adequate to penetrate the universe. Let us do our duty, which is to do as we would be done by; and that, one would think, could not be difficult, if we honestly aim at it.Your university is a noble employment in your old age, and your ardor for its success does you honor; but I do not approve of your sending to Europe for tutors and professors. I do believe there are sufficient scholars in America, to fill your professorships and tutorships with more active ingenuity and independent minds than you can bring from Europe. The Europeans are all deeply tainted with prejudices, both ecclesiastical and temporal, which they can never get rid of. They are all infected with episcopal and presbyterian creeds, and confessions of faith. They all believe that great Principle which has produced this boundless universe, Newton’s universe and Herschel’s universe, came down to this little ball, to be spit upon by Jews. And until this awful blasphemy is got rid of, there never will be any liberal science in the world.I salute your fireside with best wishes and best affections for their health, wealth and prosperity.{Letter to Thomas Jefferson, 22 January, 1825}”

“[L]iberty must at all hazards be supported. We have a right to it, derived from our Maker. But if we had not, our fathers have earned and bought it for us, at the expense of their ease, their estates, their pleasure, and their blood.”

“Abuse of words has been the great instrument of sophistry and chicanery, of party, faction, and division of society. ”

“The source of our suffering has been our timidity. We have been afraid to think....Let us dare to read, think, speak, write.”