The question asks to identify the Matthew Arnold poem containing the lines expressing a specific dilemma.

Poem Identification

The famous lines, "Wandering between two worlds, one dead, The other powerless to be born", are found in Matthew Arnold's poem "Stanzas from the Grande Chartreuse".

Context of the Dilemma

These lines encapsulate the core theme of the poem, which reflects Arnold's sense of spiritual and intellectual uncertainty during the Victorian era. He felt caught between the perceived stability and faith of the past (the "dead" world of traditional religion and values) and the nascent, uncertain, and spiritually unfulfilling modern world (the "powerless to be born" world of scientific rationalism and secularism).

• The poem vividly portrays the poet's experience visiting the Grande Chartreuse monastery.
• It expresses a deep melancholy and crisis of faith, reflecting a broader cultural anxiety of the time.
• Arnold uses this setting to explore the loss of certainty and the challenge of finding meaning in a rapidly changing world.

Therefore, "Stanzas from the Grande Chartreuse" is the correct source for the quoted lines expressing this profound dilemma.