Not so Daily Science Quote...

Teacher: (...) But let us close our discussion for the time being: we shall discuss this new stage some other time.
Sigma: But then nothing is settled. We can't stop now.
Teacher: I sympathise. This latest stage will have important feedbacks to our discussion. But a scientific inquiry 'begins and ends with problems'. [Leaves the classroom.]
Beta: But I had no problems at the beginning! And now I have nothing but problems!

p.104-105 of Imre Lakatos's greatest book, Proofs and Refutations.