“No man is your friend, no man is your enemy, but every man is your teacher”

Entry in progress—B.P.
 
Google Books
Consecrated Common Sense:
A Help to Happiness Book
By Nellie Olmsted Lincoln
San Francisco, CA: N.O. Lincoln
1926
Pg. 79:
“No man is your friend, no man is your enemy, but every man is your teacher.”
 
Google Books
The Emerald Buddha
By Elizabeth Morse
New York, NY: E.P. Dutton & Co.
1935
Pg. 183:
She used to say troubles were good to cut your teeth on, and always quoting the old saying, “No man is your enemy. No man is your friend. Every man is your teacher.”
 
Google Books
The Wisdom of Florence Scovel Shinn
By Florence Scovel Shinn
New York, NY: Simon & Schuster
1989
Pg. 54:
There is an old saying: “No man is your enemy, no man is your friend, every man is your teacher.”