Children sweeten labours, but they make misfortunes more bitter.

Observation and experiment for gathering material, induction and deduction for elaborating it: these are are only good intellectual tools.

It's not what we eat but what we digest that makes us strong; not what we gain but what we save that makes us rich; not what we read but what we remember that makes us learned; and not what we profess but what we practice that gives us integrity.

There is no passion in the mind of man so weak, but it mates and masters the fear of death . . . Revenge triumphs over death; love slights it; honor aspireth to it; grief flieth to it.

The human understanding is like a false mirror, which, receiving rays irregularly, distorts and discolors the nature of things by mingling its own nature with it.

Whence we see spiders, flies, or ants entombed and preserved forever in amber, a more than royal tomb.

The noblest works and foundations have proceeded from childless men, which have sought to express the images of their minds where those of their bodies have failed.