"Mountains are not Stadiums where I satisfy my ambition to achieve, they are the cathedrals where I practice my religion...I go to them as humans go to worship. From their lofty summits I view my past, dream of the future and, with an unusual acuity, am allowed to experience the present moment...my vision cleared, my strength renewed. In the mountains I celebrate creation. On each journey I am reborn." Anatoli Boukreev
If you can imagine it, you can achieve it.
They didn't know it was impossible, so they did it.