Edmund Landau quotes

Please forget everything that you have learned in school; for you haven't learned it. (Edmund Landau)
My book is written, as befits such easy material, in merciless telegram style ("Axiom," "Definition," "Theorem," "Proof," occasionally "Preliminary Remark")... I hope I have written this book in such a way that a normal student can read it in two days. And then (since he already knows the formal rules from school) he may forget its contents. View quote
Edmund Landau
Number theory is useful, since one can graduate with it. View quote
Edmund Landau
I will ask of you only the ability to read English and to think logically-no high school mathematics, and certainly no higher mathematics. View quote
Edmund Landau
We mathema­ticians are all a little bit crazy. View quote
Edmund Landau
Please don't read the preface for the teacher. View quote
Edmund Landau
The multiplication table will not occur in this book, not even the theorem,2 \cdot 2 = 4,but I would recommend, as an exercise, that you define2 = 1 + 1, 4 = (((1 + 1) + 1) + 1)and then prove the theorem. View quote
Edmund Landau