There's a thread you follow. It goes among things that change. But it doesn't change. People wonder about what you are pursuing. You have to explain about the thread. But it is hard for others to see. While you hold it you can't get lost. Tragedies happen; people get hurt or die; and you suffer and get old. Nothing you do can stop time's unfolding. You don't ever let go of the thread.
An old Rabbi once asked the pupils how they could tell when night had ended and day had begun.
"Could it be," asked one of the students, "When you can see an animal in the distance and tell whether it is a sheep or a dog?"
"No," answered the Rabbi.
Another asked, "Is it when you can look at a tree in the distance and tell whether it's a fig tree or a peach tree?"
”No," answered the Rabbi.
"Then when is it?" the pupils demanded.
"It is when you can look on the face of any man or woman and see that it is your sister or brother. Because if you cannot see this, it is still night."