Leonard Nimoy's final tweet

(Leonard Nimoy/Twitter)

Leonard Nimoy, famous for his portrayal of the hyper-logical alien Spock on the original Star Trek series, died on Friday at the age of 83.

Nimoy had been suffering from end-stage chronic obstructive pulmonary disease. The actor had publicly expressed regret about smoking

On Monday, Nimoy sent out his final tweet to his more than one million followers. It contained a poignant message about the impermanence of life. 

"A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP"

LLAP refers to Spock's iconic refrain: "Live long and prosper."

Nimoy certainly did just that during his time on planet Earth.