The cause of sorrow is the desire of the One to the Many, or of the Many to the One. This also is the cause of joy.
But the desire of one to another is all of sorrow; its birth is hunger, and its death satiety.
The desire of the moth for the star at least saves him satiety.
Hunger thou, O man, for the infinite: be insatiable even for the finite; thus at The End shalt thou devour the finite, and become the infinite.
Be thou more greedy that the shark, more full of yearning than the wind among the pines.
The weary pilgrim struggles on; the satiated pilgrim stops.
The road winds uphill: all law, all nature must be overcome.
Do this by virtue of THAT in thyself before which law and nature are but shadows.