Geometry Is Not True, It

One Geometry Cannot Be More True Than Another; It Can Only Be More Convenient.

Thought Must Never Submit, Neither To A Dogma, Nor To A Party, Nor To A Passion, Nor To An Interest, Nor To A Preconceived Idea, Nor To Whatever It May Be, Save To The Facts Themselves, Because, For Thought, Submission Would Mean Ceasing To Be.

A Very Small Cause, Which Escapes Us, Determines A Considerable Effect Which We Cannot Ignore, And We Say That This Effect Is Due To Chance.

If We Ought Not To Fear Mortal Truth, Still Less Should We Dread Scientific Truth. In The First Place It Can Not Conflict With Ethics? But If Science Is Feared, It Is Above All Because It Can Give No Happiness? Man, Then, Can Not Be Happy Through Science But Today He Can Much Less Be Happy Without It.

Every Good Mathematician Should Also Be A Good Chess Player And Vice Versa.