Piet Hein said this quote

ASTRO-GYMNASTICSGo on a starlit night, stand on your head,leave your feet dangling outwards into space,and let the starry firmament you treadbe, for the moment, your elected base.Feel Earth's colossal weight of ice and granite,of molten magma, water, iron, and lead;and briefly hold this strangely solid planetbalanced upon your strangely solid head.