I once learned that geese fly in a V formation to save energy. Each bird flies in the updraft created by the bird in front of it, which helps the geese preserve energy and fly longer distances at a time. When the lead bird gets tired, it drops back and another bird takes the lead.
This is a great metaphor for friendships in hard times. Friends undergoing similar challenges take turns lifting each other up. The lead position rotates depending on who has the energy to create an updraft for the others and who needs to coast in its wake.
If I scroll back through Whatsapp conversations with some of my friends, I can see the rotation happening. It is truly amazing.