I Can Doubt Everything, Except

The Only Thing We Have Power Over In The Universe Is Our Own Thoughts.

Illusory Joy Is Often Worth More Than Genuine Sorrow.

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

Hence Reason Also Demands That, Since Our Thoughts Cannot All Be True Because We Are Not Wholly Perfect, What Truth They Do Possess Must Inevitably Be Found In The Thoughts We Have When Awake, Rather Than In Our Dreams.

Each Problem That I Solved Became A Rule, Which Served Afterwards To Solve Other Problems.