Answer:
The dominant figure of speech in the poem is anaphora—the use of I love thee in eight lines and I shall but love thee in the final line. This repetition builds rhythm while reinforcing the theme. Browning also uses alliteration, as the following examples illustrate:
thee, the (Lines 1, 2, 5, 9, 12).
Step-by-step explanation:
thee,they (Line 8)
soul, sight (Line 3)
love, level (Line 5)
quiet, candle-light (Line 6)
freely, strive, Right (Line 7)
purely, Praise (Line 8)
passion, put (Line 9)
my, my (Line 10)
love, love (Line 11)
With, with (Line 12)
lost, love (Line 12)
but, better (Line 14)