There is alas no law against incompetency; no striking example is made. They learn by our bodily jeopardy and make experiments until the death of the patients, and the doctor is the only person not punished for murder.

The happier the moment the shorter.

The most valuable discoveries have found their origin in the most trivial accidents.

The only certainty is uncertainty

Our youth and manhood are due to our country, but our declining years are due to ourselves.

Men are most apt to believe what they least understand; and through the lust of human wit obscure things are more easily credited.

Nature is to be found in her entirety nowhere more than in her smallest creatures.