I believe that we do not know anything for certain, but everything probably.

— Christiaan Huygens, Letter to Pierre Perrault (1673)

Source: http://books.google.com/books?id=9IVA7sK_Bh8C

Written to Pierre Perrault in 1673 and printed in Huygens's Oeuvres Complètes (1897).

Topics: philosophy