Dag Hammarskjold, Gen Sec of the UN, died (killed?) Sept 18 1961. “I came to a time and place where I realized that the Way leads to a triumph which is a catastrophe and to a catastrophe which is a triumph, that the price for committing one’s life would be reproach,…

…and that the only elevation possible to man lies in the depths of humiliation. After that, the word “courage” lost its meaning, since nothing could be taken from me.”

Where is this quotation from, please? Was it a speech or from his writings? Thank you!