thread of life

Noun

Meaning

(Greek mythology) A metaphor for the lifespan of an individual, as generated by Clotho, measured out by Lachesis and terminated by Atropos.

(poetic) DNA.

The link of inheritance from past to present.

Destiny, fate.

Source: en.wiktionary.org

For Fate has wove the thread of life with pain And twins even from the birth are Misery and Man. Homer