How Can You Be Certain

It Is Contrary To Reasoning To Say That There Is A Vacuum Or Space In Which There Is Absolutely Nothing.

At Last I Will Devote Myself Sincerely And Without Reservation To The General Demolition Of My Opinions.

The Senses Deceive From Time To Time, And It Is Prudent Never To Trust Wholly Those Who Have Deceived Us Even Once.

...it Is Certain That I Am Really Distinct From My Body, And Can Exist Without It.

God Alone Is The Author Of All The Motions In The World.