7 November
One night in 1619, when Rene Descartes was still quite young, he dreamed all night long.
As he told it, in the first dream he was bent over, unable to straighten up, struggling to walk against a fierce wind that propelled him toward school and church.
In the second dream a bolt of lightning knocked him out of bed and the room filled up with sparks that illuminated everything in sight.
And in the third he opened an encyclopedia, looking for a way to live his life, but those pages were missing.