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.

Let not your rage or malice destroy a life.

Truth was always but the daughter of time.

Every action needs to be prompted by a motive.

A wave is never found alone, but is mingled with as many other waves as there are uneven places in the object where the said wave is produced.

Men of genius sometimes accomplish most when they work least, for they are thinking out inventions.

For those colours which you wish to be beautiful, always first prepare a pure white ground.