Nothing Comes Out Of Nothing.

I Should Consider That I Know Nothing About Physics If I Were Able To Explain Only How Things Might Be, And Were Unable To Demonstrate That They Could Not Be Otherwise.

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

There Is A Great Difference Between Mind And Body Insomuch As Body Is By Nature Always Divisible, And The Mind Is Entirely Indivisible.

Divide Each Difficulty At Hand Into As Many Pieces As Possible And As Could Be Required To Better Solve Them.

Just As We Believe By Faith That The Greatest Happiness Of The Next Life Consists Simply In The Contemplation Of This Divine Majesty, Likewise We Experience That We Derive The Greatest Joy Of Which We Are Capable In This Life From The Same Contemplation, Even Though It Is Much Less Perfect.