...learn from my miseries, and do not seek to increase your own.

And now, once again, I bid my hideous progeny go forth and prosper. I have an affection for it, for it was the offspring of happy days, when death and grief were but words, which found no true echo in my heart.

A human being in perfection ought always to preserve a calm and peaceful mind and never to allow passion or a transitory desire to disturb his tranquility.

Solitude was my only consolation - deep, dark, deathlike solitude.

You seek for knowledge and wisdom as I once did; and I ardently hope that the gratification of your wishes may not be a serpent to sting you, as mine has been.

None but those who have experienced them can conceive of the enticements of science.

Life is obstinate and clings closest where it is most hated.