The quote "Not who you are born with, but with whom you agree" from Miguel de Cervantes' "Don Quijote of La Mancha" emphasizes the importance of relationships and choices over mere birthright. It suggests that our true identity is shaped more by the people we choose to associate with rather than our family or background. This reflects a deeper understanding of how connections influence our beliefs, values, and actions in life.

Cervantes' work often explores themes of individuality and the quest for personal meaning. This particular quote invites readers to consider the impact of their friendships and alliances, highlighting that the essence of a person's character can be found in their affiliations. It signifies that mutual understanding and shared perspectives are fundamental in defining one's identity.