Answer:
John Muir paints a picture of his long journey. He says that he had a long ,tiring and struggling journey and just when he was about to give up, he found the Calypso. He shares with us the he realized the all these hardships he faced, it was for a reason, to find Calypso, which was a once in a lifetime experience for him. It was definetly worthwhile for him
"But when the sun was getting low and everything seemed most bewildering and discouraging, I found beautiful Calypso on the mossy bank of a stream."
John Muir says that he got something out of that experience. He came closer to the nature, got a better understanding of both life and nature, which eventually changed him into a better person.
"It seems wonderful that so frail and lovely a plant has such power over human hearts"