Adaptability and resilience are key to long-term success.

Washington is no place in which to carry out inventions.

At each increase of knowledge, as well as on the contrivance of every new tool, human labour becomes abridged.

I have matured a lot.

The mastery of nature is vainly believed to be an adequate substitute for self mastery.

Experience assures us, that the efficacy of the provision has been greatly over-rated; and that some more adequate defense is indispensably necessary for the more feeble, against the more powerful members of the government.

But a science is exact to the extent that its method measures up to and is adequate to its object.

If we do more with less, our response will be adequate to take care of everybody.