Which lines in this excerpt from the poem "Dreams" by Edgar Allan Poe use enjambment?

Oh! that my young life were a lasting dream!

My spirit not awakening, till the beam

Of an Eternity should bring the morrow.

Yes! tho' that long dream were of hopeless sorrow,

'Twere better than the cold reality

Of waking life, to him whose heart must be,

The second and third lines "My spirit not awakening, till the beam Of an Eternity should bring the morrow." along with the fifth and sixth "'Twere better than the cold reality Of waking life, to him whose heart must be," Form examples of enjambment where a sentence without a natural break is broken across two lines.

My spirit not awakening, till the beam

Of an Eternity should bring the morrow.

AND

'Twere better than the cold reality

Of waking life, to him whose heart must be,

Enjambment is when a sentence continues across two lines of poetry without a pause. When reading poetry, the reader does not pause at the end of each line, instead one should pause only according to the punctuation. The lines that end with "beam" and "reality" have no punctuation and therefore should not have a pause. The lines ending in dream, morrow, sorrow, and be all have some form of punctuation so these lines are not enjambment.