When I heard the learn'd astronomer;
When the proofs, the figures, were ranged in columns
    before me;
When I was shown the charts and the diagrams, to add,
    divide, and measure them;
When I, sitting, heard the astronomer, where he
    lectured with much applause in the lecture-room,
How soon, unaccountable, I became tired and sick;
Till rising and gliding out, I wander'd off by myself,
In the mystical moist night-air, and from time to tim,
Look'd up in perfect silence at the stars.