Mathematics Is Written For Mathematicians.

Finally We Shall Place The Sun Himself At The Center Of The Universe.

So Far As Hypotheses Are Concerned, Let No One Expect Anything Certain From Astronomy, Which Cannot Furnish It, Lest He Accept As The Truth Ideas Conceived For Another Purpose, And Depart From This Study A Greater Fool Than When He Entered It.

The Strongest Affection And Utmost Zeal Should, I Think, Promote The Studies Concerned With The Most Beautiful Objects, Most Deserving To Be Known.

Since, Then, There Is No Objection To The Mobility Of The Earth, I Think It Must Now Be Considered Whether Several Motions Are Appropriate For It, So That It Can Be Regarded As One Of The Wandering Stars. For The Fact That It Is Not The Centre Of All Revolutions Is Made Clear By The Apparent Irregular Motion Of The Wandering Stars, And Their Variable Distances From The Earth, Which Cannot Be Understood In A Circle Having The Same Centre As The Earth.

So, Influenced By These Advisors And This Hope, I Have At Length Allowed My Friends To Publish The Work, As They Had Long Besought Me To Do.