Sole reigning holds the tyranny of Heaven.

9. Which, when Beelzebub perceived (than whom,
Satan except, none higher sat), with grave
Aspect, he rose, and in his rising seemed
A pillar of state.

10. Thee, Sion, and the flowery brooks beneath,
That wash thy hallowed feet, and warbling flow,
Nightly I visit: nor sometimes forget,
Those other two equaled with me in fate.

NOTE.--Although it would be necessary, in these examples, to violate the
laws of accent or emphasis, to give perfect rhythm, yet a careful and
well-trained reader will be able to observe these laws and still give the
rhythm in such a manner that the defect will scarcely be noticed.

POETIC PAUSES. (43)

In order to make the measure of poetry perceptible to the ear, there
should generally be a slight pause at the end of each line, even where the
sense does not require it.

There is, also, in almost every line of poetry, a pause at or near its
middle, which is called the caesura.

This should, however, never be so placed as to injure the sense of the
passage. It is indeed reckoned a great beauty, where it naturally
coincides with the pause required by the sense. The caesura, though
generally placed near the middle, may be placed at other intervals.