A four-line poem, also known as a quatrain, allegedly written by 16th-century philosopher Michel de Nostradamus described predictions of a future “plague” that would “fall upon the world.” ...

The poem’s tercets evoke an uneasy balance, until the fourth stanza, where a quatrain appears, suspending time for just a little bit longer, like those who leaped from the burning floors.

Musk, who also founded SpaceX, appeared to address the post to “humankind” before copying the text to the poem known as The Quatrain of Seven Steps. The poem, known for being about a ...