The meaning of friendships

Whilst walking through the Willows Estate in Johannesburg, South Africa, my dear friend Eva and I, were discussing Paulo Coelho's book, "The Pilgrimage"
There was a quote in that book that began a thought provoking discussion.
Here is the quote from Paulo Coelho:
“The ship is safest when it is in port, but that’s not what ships were built for.”
That got us discussing the meaning of a safe port/harbor. She described it in such a beautiful way,
"Each of us are ships and we have to navigate the rough seas on our own bu