To Invent Is To Discern, To Choose.

All The Scientist Creates In A Fact Is The Language In Which He Enunciates It. If He Predicts A Fact, He Will Employ This Language, And For All Those Who Can Speak And Understand It, His Prediction Is Free From Ambiguity. Moreover, This Prediction Once Made, It Evidently Does Not Depend Upon Him Whether It Is Fulfilled Or Not.

[t]he Different Branches Of Arithmetic - Ambition [g]eometry Is Not True, It Is Advantageous.

All Of Mathematics Is A Tale About Groups.

Ideas Rose In Clouds; I Felt Them Collide Until Pairs Interlocked, So To Speak, Making A Stable Combination.

The Task Of The Educator Is To Make The Child's Spirit Pass Again Where Its Forefathers Have Gone, Moving Rapidly Through Certain Stages But Suppressing None Of Them. In This Regard, The History Of Science Must Be Our Guide.