Serendipity... You will understand it better by the derivation than by the definition. I once read a silly fairy tale, called 'The Three Princes of Serendip': as their Highnesses traveled, they were always making discoveries, by accidents and sagacity, of things which they were not in quest of.

Pedants make a great rout about criticism, as if it were a science of great depth, and required much pains and knowledge--criticism however is only the result of good sense, taste and judgment--three qualities that indeed seldom are found together, and extremely seldom in a pedant, which most critics are.

Oh that I were seated as high as my ambition, I'd place my naked foot on the necks of monarchs.

In science, mistakes always precede the truth

How posterity will laugh at us, one way or other! If half a dozen break their necks, and balloonism is exploded, we shall be called fools for having imagined it could be brought to use: if it should be turned to account, we shall be ridiculed for having doubted.

Nine-tenths of the people were created so you would want to be with the other tenth.

To act with common sense according to the moment, is the best wisdom I know.