This is a quotation from a poem by William Wordsworth, published in 1807, entitled Resolution and Independence (or The Leech-gatherer). It describes the poet's meeting with a leech-gatherer on one of the Cumbrian fells.
My former thoughts returned: the fear that kills;
And hope that is unwilling to be fed;
Cold, pain, and labour, and all fleshly ills;
And mighty poets in their misery dead.