Leonard Nimoy may be gone, but his final message on Twitter couldn’t be more perfect.

On Feb. 22, the 83-year-old actor left the following bit of advice to his 1.1 million followers. After news broke of the actor’s death on Friday, the tweet accumulated 47,000 retweets within an hour. The tweet was signed with the actor’s usual signature, LLAP — “Live long and prosper,” echoing his iconic Star Trek character, Spock.