I sat, a solitary man,In a crowded London shop,An open book... - W.B. Yeats, The Winding Stair and Other Poems

"I sat, a solitary man,In a crowded London shop,An open book and empty cupOn the marble table-top.While on the shop and street I gazedMy body of a sudden blazed;And twenty minutes more or lessIt seemed, so great my happiness,That I was blessed and could bless."