what does it mean?

在internet查到這一段
Morrie’s doctors guessed he had two years left. Morrie knew it was less. But
my old professor had made a profound decision, one he began to construct the
day he came out of the doctor’s office with a sword hanging over his head. Do I
either give up and disappear, or do I make the best of my time left?”

It is like the sword of Damocles hanging over one's head:
(希臘民間傳說中的) 達摩克里斯(古代Syracuse 國王Dionysius 的廷臣, 傳說國王請達摩克里斯赴宴, 命他坐在以一絲頭發懸掛的劍下, 以示帝王多危)
the sword of Damocles : 幸福中所隱藏的危險

sword hanging over one's head或可譯作隱憂之類.

你指的那一段或可譯為:
他離開醫務所的時候憂心忡忡,但當天他做了一個重大的決定.

Do I either give up and disappear, or do I make the best of my time left?”
我應該放棄並消失,抑或是好好地利用我的餘生?

但他做出了一個深刻決定, 一個他開始修建天他從醫生的辦公室出來與劍垂懸在他的頭。 它是什麼句子結構? 並且意味什麼應該我凋枯和消失?