metaphor- 'threaded' - undercurrent motive of inner journeys.
assonance- 'subtler', 'sometimes', 'unconscious' - flow and continuity (link to journey).
Biblical allusion - 'blessed,' 'purer' - emphasises spiritual nature of journey.
enjambment and long sentences- sense of continuity and flow through passage(journey).
metaphor- 'purer realm' emotive, conotative of spirituality. higher level of perception gained in inner journey.
contrast and juxtaposition of 'purer realm' (inner journey) to 'vacations'(physical). look out for other complimentary opposites. they enhance comparison 'tween physical and spiritual realm
alliteration- 'unconscious' 'compulsion' - emphasis on internal motives for journey
but if not whenever is good also