Source: Special Topics in Calamity Physics
Quotes about path
page 5

“Pursue some path, however narrow and crooked, in which you can walk with love and reverence.”

“Declining from the public ways, walk in unfrequented paths.”
Symbol 5
The Symbols

Source: Life Together: The Classic Exploration of Christian Community

“If you are on the right path, it will always be uphill.”
“Those who get in the way of love's path will be kicked by horses.
~Kyoya”
Source: Ouran High School Host Club, Vol. 17
“There are no mistakes. Only new paths to explore.”

Source: Reborn: Journals and Notebooks, 1947-1963
Source: Memoirs of a Geisha

“it is only courage on the path itself that makes the path appear”
Source: Flowers for Algernon

“Once you start down the dark path, forever will it dominate your destiny, consume you it will…”

“When you are on the right path, invisible hands will come to your aid.”

“With no surroundings there can be no path, and with no path one cannot become free.”
Source: Practice of the Wild

“A path is a prior interpretation of the best way to traverse a landscape.”
Source: Wanderlust: A History of Walking
Source: The Book of Blood and Shadow

“Does the walker choose the path, or the path the walker?”
Quoted various times by different characters in all three books.
Old Kingdom series (The Abhorsen Trilogy)
Source: Sabriel

“Do the right thing by whoever crosses your path. Those coincidental people are your people.”
Source: Tripmaster Monkey: His Fake Book

“Adversity is the first path to truth.”

“The author should die once he has finished writing. So as not to trouble the path of the text.”
Source: Postscript to the Name of the Rose

“*Only if you reject all the other paths can you discover your own path.”
Source: Mind Is a Myth
“Travelers, there is no path, paths are made by walking.”
"Proverbios y cantares XXIX" [Proverbs and Songs 29], Campos de Castilla (1912); trans. Betty Jean Craige in Selected Poems of Antonio Machado (Louisiana State University Press, 1979)
Context: Wanderer, your footprints are
the path, and nothing else;
wanderer, there is no path,
the path is made by walking.
Walking makes the path,
and on glancing back
one sees the path
that will never trod again.
Wanderer, there is no path—
Just steles in the sea.

“Of all the paths you take in life, make sure a few of them are dirt.”
I searched for keywords of that text in his books online and on an electronic copy of Muir of the Mountains, and was unable to find it. On rare occasions we find something in Muir's unpublished journals that is new and which can be verified. So I also did a search of the John Muir Papers at the University of the Pacific, and once again came up empty:
Misattributed

“There are no wrong turnings. Only paths we had not known we were meant to walk.”
Part 3 “Ember to Ember”, Chapter 10 (p. 317)
Source: Tigana (1990)

“You had to take risks, follow some paths and abandon others.”
Source: Brida

“Go oft to the house of thy friend, for weeds choke the unused path.”

Source: Plenty: A Collection of Sarah McLachlan's Favorite Recipes

Source: Brida (1990).
Context: When you find your path, you must not be afraid. You need to have sufficient courage to make mistakes. Disappointment, defeat, and despair are the tools God uses to show us the way.

1960s, (1963)

“Through buried paths, where sleepy twilight dreams
The summer time away.”
Source: Bright Star: Love Letters and Poems of John Keats to Fanny Brawne

Source: Leonard Cohen: Poems and Songs
Source: The Glass Rainbow

page 332
Source: A Million Little Pieces (2003)
Context: All of us started out normal. All of us started out as functioning human beings with the potential to do almost anything we wanted, but somewhere along the paths of our lives we got lost. Though we are here at this Clinic trying to find our way back, we all know that most of us will never get there. Things like the fight allow us to dream, and take us away from here, and allow us to imagine what the normal World must be like and how normal people must live in it.
“Over every mountain, there is a path, although it may not be seen from the valley.”

“Reason is in fact the path to faith, and faith takes over when reason can say no more.”

“Learning to ignore things is one of the great paths to inner peace.”
Source: Calculating God (2000), Chapter 14 (p. 137)
“There are a hundred paths through the world that are easier than loving. But, who wants easier?”
Source: New and Selected Poems, Vol. 1
Source: Breaking Free: Discover the Victory of Total Surrender
Source: The Teachings of Don Juan: A Yaqui Way of Knowledge
Source: Secrets of a Summer Night

"A Book That Influenced Me"
Two Cheers for Democracy (1951)