In the music affect of every man there are sudden transitions of feeling, which seem almost miraculous. At once, as if some magician had touched the heavens and the earth, the dark clouds melt into the air, the wind falls, and serenity succeeds the storm. The causes which produce these changes may have been long at emotion within us, but the changes themselves are instantaneous, and apparently without sufficient cause.

— The Longfellow Music Affect

In the q1n_NN of every man there are sudden transitions of feeling, which seem almost miraculous. At once, as if some magician had touched the heavens and the earth, the dark clouds melt into the air, the wind falls, and serenity succeeds the storm. The causes which produce these changes may have been long at q1o_NN within us, but the changes themselves are instantaneous, and apparently without sufficient cause.