The desire to know is natural to good men.

People of higher talent work, even if they seem to do nothing

In the days of thy youth seek to obtain that which shall compensate the losses of thy old age.

The part always has a tendency to reunite with its whole in order to escape from its imperfection.

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

To me it seems that those sciences are vain and full of error which are not born of experience, mother of all certainty, first-hand experience which in its origins, or means, or end has passed through one of the five senses.

O Time! consumer of all things; O envious age! thou dost destroy all things and devour all things with the relentless teeth of years, little by little in a slow death. Helen, when she looked in her mirror, seeing the withered wrinkles made in her face by old age, wept and wondered why she had twice been carried away.