There is an art to finding your way in the lower regions by the memory of what you have seen when you were higher up. When you can no longer see, you… - René Daumal

So what’s the point? Only this: what is above knows what is below, what is below does not know what is above. While climbing, take note of all the difficulties along your path. During the descent, you will no longer see them, but you will know that they are there if you have observed carefully.

You see,” Totochabo pointed out to me, “I’m as fed up with all this as you are. I shall now devise a way of shutting him up with a spot of sham erudition.”
Raising his voice, he went on:
“If it’s half-wits you want, you’d better go and look for them somewhere else, for we know jolly well that beneath the perceptible form of sound is hidden a silent essence. It is from this, this crucial point at which the kernel of the perceptible has yet to choose to be sound or light or something else, from this hinterland of nature where to see is to see sound and to hear is to hear suns, it is from this very essence that sound draws its power and its ordering force.”
And with a wink in my direction, he whispered:
“That should silence them, wouldn’t you say?”
“For good,” I replied. “But when you say sham erudition, do you mean real knowledge?”
“My poor fellow,” he said, “how very thirsty you are!”
It was true and I set about treating my condition.

To reach the summit, one must proceed from encampment to encampment. But before setting out for the next refuge, one must prepare those coming after to occupy the place one is leaving. Only after having prepared them can one go on up. That is why, before setting out for a new refuge, we had to go back down in order to pass on our knowledge to other seekers...