In "The Full Cupboard of Life" by Alexander McCall Smith, the idea is presented that seeking advice from a knowledgeable outsider can be more beneficial than consulting familiar acquaintances. This is due to the objectivity and fresh perspective that a wise stranger can provide, which may not always be available in close relationships. It highlights the value of external insights, especially when facing important decisions or dilemmas.

The quote emphasizes the importance of choosing a wise stranger for guidance rather than any random individual. This suggests that while friends and family are often relied upon, sometimes the best counsel comes from someone who can view the situation without personal bias or emotional attachment, bringing clarity and wisdom to the advice given.