Being willing is not enough. We must do.

The days are long enough for those who use them.

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.

Black is like a broken vessel, which is deprived of the capacity to contain anything.

When that which loves is united to the thing beloved it can rest there; when the burden is laid down it finds rest there. There will be eternal fame also for the inhabitants of that town, constructed and enlarged by him.

Of the original phenomena, light is the most enthralling.

Avoid studies of which the result dies with the worker.