"A person will sometimes devote all his life to the development of one part of his body - the wishbone"

This quote by Robert Frost is a commentary on the human condition and how we typically concentrate on one aspect of our lives to the exclusion of all else. It suggests that we can become so obsessed with a single goal or ambition that we commit our whole lives to it, overlooking other aspects of our lives. The metaphor of the wishbone indicates that we are so focused on accomplishing our objective that we forget to delight in the journey. Frost is recommending that we must take a step back and value the other elements of life, such as relationships, experiences, and knowing. He is warning us against becoming too focused on one thing, as it can lead to a life of unfinished potential. Eventually, Frost is encouraging us to discover balance in our lives and to value the journey, not just the location.