I Think; Therefore I Am.

Instead I Ought To Be Grateful To Him Who Never Owed Me Anything For Having Been So Generous To Me, Rather Than Think That He Deprived Me Of Those Things Or Has Taken Away From Me Whatever He Did Not Give Me.

I Did Not Imitate The Skeptics Who Doubt Only For Doubting's Sake, And Pretend To Be Always Undecided; On The Contrary, My Whole Intention Was To Arrive At A Certainty, And To Dig Away The Drift And The Sand Until I Reached The Rock Or The Clay Beneath.

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

I Concluded That I Might Take As A General Rule The Principle That All Things Which We Very Clearly And Obviously Conceive Are True: Only Observing, However, That There Is Some Difficulty In Rightly Determining The Objects Which We Distinctly Conceive.

Omnia Apud Me Mathematica Fiunt.