The common theme of the poem "Clearances 3" by Seamus Heaney and the poem "what lips my lips have kissed" by Edna St. Vincent Millay is nostalgia and reminiscence. Both poems reflect on past experiences and relationships, with a sense of loss and longing for the past. The speakers in both poems look back on their memories with a mix of sadness and fondness, as they come to terms with the passage of time and the changes that have occurred. Overall, the poems convey a theme of nostalgia for the past and a desire to hold on to fleeting moments of love and connection.
