Science Is Practical Philosophy.

I Think; Therefore I Am.

If We Possessed A Thorough Knowledge Of All The Parts Of The Seed Of Any Animal (e.g. Man), We Could From That Alone, Be Reasons Entirely Mathematical And Certain, Deduce The Whole Conformation And Figure Of Each Of Its Members, And, Conversely If We Knew Several Peculiarities Of This Conformation, We Would From Those Deduce The Nature Of Its Seed.

When I Consider This Carefully, I Find Not A Single Property Which With Certainty Separates The Waking State From The Dream. How Can You Be Certain That Your Whole Life Is Not A Dream?

Before Examining This More Carefully And Investigating Its Consequences, I Want To Dwell For A Moment In The Contemplation Of God, To Ponder His Attributes In Me, To See, Admire, And Adore The Beauty Of His Boundless Light, Insofar As My Clouded Insight Allows. Believing That The Supreme Happiness Of The Other Life Consists Wholly Of The Contemplation Of Divine Greatness, I Now Find That Through Less Perfect Contemplation Of The Same Sort I Can Gain The Greatest Joy Available In This Life.

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