[1.] From harmony, etc. Some of the ancients believed that music
helped in the creation of the heavenly bodies, and that their motions
were accompanied by a harmony known as "the music of the spheres."

[2.] This universal frame, the visible universe.

[3.] The diapason, etc. _The diapason_ means here _the entire compass
of tones_. The idea is that in man, the highest of God's creatures,
are included all the virtues and powers of the lower creation.

[4.] Jubal. It is said of Jubal: "He was the father of all such as
handle the harp and organ."--Genesis iv, 21.

[5.] The corded shell, _i.e._ the lyre. The first lyre was supposed to
have been formed by drawing strings over a tortoise shell.

[6.] Mortal alarms, _i.e._ notes that rouse men to deadly conflict.

[7.] Discovers, reveals.

[8.] Mend, amend, improve.

[9.] Orpheus is said to have been a Thracian poet who moved rocks and
trees and tamed wild beasts by playing upon his lyre.

[10.] Straight, straightway, immediately.

[11.] The last and dreadful hour, the Day of Judgment.