In the book "Sunshine on Scotland Street" by Alexander McCall Smith, the character Angus reflects on the nature of friendship. He realizes that, while friendships often require effort and can be challenging to maintain, they are always welcoming and accommodating. This metaphor highlights the importance of nurturing these connections, suggesting that, despite life's demands, true friendships remain accessible and inviting.

Angus's insight reinforces the idea that, regardless of the busyness that may come with maintaining relationships, there is a constant openness to friendship. It implies that no matter how complicated life becomes, the doors to true friends are always ajar, ready to offer support and companionship. This perspective encourages readers to value and prioritize their relationships, appreciating the warmth and accessibility that genuine friendships provide.