ボブ・ディラン

How many Hamiltonians must a student perturbate
Before you call him a physicist?

Yes, how many Fermi seas must an electron sail
Before it contributes paramagnetism?

Yes, how many times must final exams be held
Before they're forever banned?

The answer, my friend, is blowin' in the wind
The answer is blowin' in the wind...

いや，むしろ今の気分は

Knock, knock, knockin' on the heaven's door...

（ぉぃ