No More Learning

The mode in which he           to
make the circuit of the universe, and demand categorical information
"now of the planetary and now of the fixed," might put one in mind of
Hecate's mode of ascending in a machine from the stage, "midst troops
of spirits," in which you now admire the skill of the artist, and next
tremble for the fate of the performer, fearing that the audacity of
the attempt will turn his head or break his neck.