Assertion: dramatist's work | /r/CapableOf | take its strength
Facets:
value: from his spiritual growth
type: OTHER
Source sentences:
text: Yeats’s work of this period takes its strength from his long and dedicated apprenticeship to poetry; from his experiments in a wide range of forms of poetry, drama, and prose; and from his spiritual growth and his gradual acquisition of personal wisdom, which he incorporated into the framework of his own mythology.