“True friendship can afford true knowledge. It does not depend on darkness and ignorance.”
Help us to complete the source, original and additional information
Henry David Thoreau 385
1817-1862 American poet, essayist, naturalist, and abolitio… 1817–1862Related quotes

“True ignorance is not the absence of knowledge, but the refusal to acquire it.”
As quoted by Mark Damazer in "In Our Time's Greatest Philosopher Vote" at In Our Time (BBC 4) http://www.bbc.co.uk/radio4/history/inourtime/greatest_philosopher_celeb.shtml

As quoted in Hindu Psychology : Its Meaning for the West (1946) by Swami Akhilananda, p. 204

“Rare as is true love, true friendship is rarer.”

“Opposition is true Friendship.”
A Memorable Fancy
1790s, The Marriage of Heaven and Hell (1790–1793)
Source: The Portable Blake

“Depth of friendship does not depend on length of acquaintance”

Un Art de Vivre (The Art of Living) (1939), The Art of Friendship