It is in the shelter of each other that the people live.
From "Different Seasons: Twelve Months of Wisdom and Inspiration" by Dale Turner:
Some years ago a telephone operator in a small Cape Cod town received a daily call from a man who asked the exact time. This went on for many weeks. Finally the operator asked the caller why he called every day requesting the right time. 'Because,' responded the caller, 'I am the man responsible for blowing the whistle at noon each day.'
'Well, that's mighty odd,' the operator replied, 'because every day, exactly at noon, I set my clock by your whistle.'
A simple story, but an accurate parable of life. We are dependent on one another, and each life has more far-reaching effect on others than is often ever realized."