Here’s a thought in elaboration. In his book “The Pound Era”, Hugh Kenner explores the idea of a “subject rhyme”, rather than a sound-rhyme, as a means of poetic organization. One way to understand that is that the experience is unrepeatable but occurs in rhyme with preceding (and following) experience, in the way each member of a family is unique over the generations and yet related, sometimes closely.
sub rosa 
Here’s a thought in elaboration. In his book “The Pound Era”, Hugh Kenner explores the idea of a “subject rhyme”, rather than a sound-rhyme, as a means of poetic organization. One way to understand that is that the experience is unrepeatable but occurs in rhyme with preceding (and following) experience, in the way each member of a family is unique over the generations and yet related, sometimes closely.
Nothing is repeatable. There is newness to everyting. Thank you Sigrun, Micheline