Not long ago, I caught myself experiencing a most incredible sensation. Leafing through a book on Hitler, I was touched by some of his portraits: they reminded me of my childhood. I grew up during the war; several members of my family perished in Hitler's concentration camps; but what were their deaths compared with the memories of a lost period in my life, a period that would never return?
This reconciliation with Hitler reveals the profound moral perversity of a world that rests essentially on the nonexistence of return, for in this world everything is pardoned in advance and therefore everything cynically permitted.
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If every second of our lives recurs an infinite number of times, we are nailed to eternity as Jesus Christ was nailed to the cross. It is a terrifying prospect. In the world of eternal return the weight of unbearable responsibility lies heavy on every move we make. That is why Nietzsche called the idea of eternal return the heaviest of burdens (das schwerste Gewicht).
If eternal return is the heaviest of burdens, then our lives can stand out against it in all their splendid lightness.
But is heaviness truly deplorable and lightness splendid?
The heaviest of burdens crushes us, we sink beneath it, it pins us to the ground. But in the love poetry of every age, the woman longs to be weighed down by the man's body. The heaviest of burdens is therefore simultaneously an image of life's most intense fulfillment. The heavier the burden, the closer our lives come to the earth, the more real and truthful they become.