He who does not oppose evil......commands it to be done.

An arch consists of two weaknesses which, leaning one against the other, make a strength.

The knowledge of the past times and of the places of the earth is both an ornament and nutriment to the human mind.

Old age takes in part savoury wisdom for its food - see to that your old age will not lack in nourishment.

Marriage is like putting your hand into a bag of snakes in the hope of pulling out an eel.

Although human ingenuity may devise various inventions which, by the help of various instruments, answer to one and the same purpose, yet will it never discover any inventions more beautiful, more simple or more practical than those of nature, because in her inventions there is nothing lacking and nothing superfluous; and she makes use of no counterpoise when she constructs the limbs of animals in such a way as to correspond to the motion of their bodies, but she puts into them the soul of the body.

Some promises and time disappoint us