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The moral sense, or conscience, is as much a part of man as his leg or arm. It is given to all human beings in a stronger or weaker degree, as force of members is given them in a greater or less degree. It may be strengthened by exercise, as may any particular limb of the body. This sense is submitted, indeed, in some degree, to the guidance of reason; but it is a small stock which is required for this: even a less one than what we call common sense. State a moral case to a ploughman and a professor. The former will decide it as well, and often better than the latter, because he has not been led astray by artificial rules.

Thomas Jefferson#144

ReasonMoralityEthicsConscienceHuman nature

About this quote

What does it mean?
Jefferson argues that conscience is an innate human faculty like a limb, which can be strengthened through practice and guided by reason without needing complex artificial rules.
In plain terms
Everyone has a built-in moral sense that gets stronger with use.
What can you take from it?
Practice your moral judgments to strengthen your conscience.

Where it applies

  • personal ethics
  • moral education
  • everyday decisions

Putting it to work

  • reflect on daily choices
  • practice moral reasoning
  • trust your gut

Questions to consider

  • How do you strengthen your conscience?
  • Does reason override intuition?

Another view

Not everyone agrees that moral sense is innate rather than learned.

More from Thomas Jefferson

  1. He who made us would have been a pitiful bungler, if he had made the rules of our moral conduct a matter of science. For one man of science, there are thousand…

    Permalink to quote #143
  2. Above all things, lose no occasion of exercising your dispositions to be grateful, to be generous, to be charitable, to be humane, to be true, just, firm, orde…

    Permalink to quote #145
  3. And for the support of this declaration, with a firm reliance on the protection of divine providence, we mutually pledge to each other our lives, our fortunes,…

    Permalink to quote #142

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