Felix Klein

Thus, in a sense, mathematics has been most advanced by those who distinguished themselves by intuition rather than by rigorous proofs.

The developing science departs at the same time more and more from its original scope and purpose and threatens to sacrifice its earlier unity and split into diverse branches.

Everyone knows what a curve is, until he has studied enough mathematics to become confused through the countless number of possible exceptions.

I don't think anyone would look at Colombia today and say that it is failing. This positive outcome is an example of the effective application of smart power - it is succeeding.

That is the definition of equal justice under law: everyone gets a fair shot, everyone pays their fair share, and everyone plays by the same set of rules.

The simplest schoolboy is now familiar with truths for which Archimedes would have sacrificed his life.