Except Our Own Thoughts, There Is Nothing

I Can Doubt Everything, Except One Thing, And That Is The Very Fact That I Doubt. Simply Put - I Think, Therefore I Am

For Each Of Us There Is A Set Limit To Our Intellectual Powers Which We Cannot Pass.

Divide Each Difficulty Into As Many Parts As Is Feasible And Necessary To Resolve It.

It Is Possible That I Am Dreaming Right Now And That All Of My Perceptions Are False.

It Must Not Be Thought That It Is Ever Possible To Reach The Interior Earth By Any Perseverance In Mining: Both Because The Exterior Earth Is Too Thick, In Comparison With Human Strength; And Especially Because Of The Intermediate Waters, Which Would Gush Forth With Greater Impetus, The Deeper The Place In Which Their Veins Were First Opened; And Which Would Drown All Miners.