"In tragedy and despair, when an endless night seems to have fallen, hope can be found in the realization that the companion of night is not another night, that the companion of night is day, that darkness always gives way to light, and that death only rules half of creation, life the other half." ~ Dean Koontz, from the book 'Lightening'
(Cut me some slack if you own this book and come to find that this quote is not EXACTLY as it appears there. I did this from memory.)