The speaker doesn’t seem to be happy about his decision. Whether the choice is right or wrong can’t be decided on the spur of the moment. Only after ‘ages and ages’ he will realise the mistake that he made years ago. He will be ‘telling with a sigh’ to others that it was not a wise decision. Two roads diverged in a wood and he ‘took the one less travelled by’. The roads are fascinating metaphors for life. The choice has made all the difference in his life.