“It is not the mountain we conquer, but ourselves.”
Though widely attributed to Hillary on the internet and in several Books (e.g. That's Life : Wild Wit & Wisdom (2003) by Bonnie Louise Kuchler, p. 20), this appears to have originated from George Mallory. Source: https://quoteinvestigator.com/2016/08/18/conquer/
Ref: en.wikiquote.org - Edmund Hillary / Disputed
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Edmund Hillary 25
New Zealand mountaineer 1919–2008Related quotes

1820s, Signs of the Times (1829)

1960s, Keep Moving From This Mountain (1965)

“We look at the mountain to see the painting, then we look at the painting to see the mountain.”
Source: 1950's, In: Reminiscence and Reverie, 1951, p. 231

“We sit together, the mountain and me, until only the mountain remains.”

As quoted in Great Climbs: A Celebration of World Mountaineering (1994) by Sir Chris Bonington

“We bow only to the highest mountain.”
The Rope of Man, epilogue, ISBN 0790008947.

Spiritual Canticle of The Soul and The Bridegroom
Context: Let us rejoice, O my Beloved!
Let us go forth to see ourselves in Thy beauty,
To the mountain and the hill,
Where the pure water flows:
Let us enter into the heart of the thicket. ~ 36

Source: Enigmas Of Chance (1985), Chapter 2, Lwów, p. 39.