“Too long a sacrifice
Can make a stone of the heart.
Oh, when may it suffice?”
W.B. Yeats book Michael Robartes and the Dancer
St. 4 <br class="br">Michael Robartes and the Dancer (1921), Easter, 1916 http://poetry.poetryx.com/poems/1477/ <br class="br">Variant: Too long a sacrifice<br>Can make a stone of the heart. <br class="br">Source: Easter 1916 and Other Poems