Leonard Nimoy, who won over an obsessive fan-base with his logical, pointy-eared Mr. Spock on Star Trek, died on Feb. 27. He was 83.
His final tweet from Monday was exceptionally poignant:
Nimoy signed all his tweets “LLAP” or “Live Long and Prosper,” his character’s catchphrase from the Star Trek series and films.
Nimoy had announced via Twitter last year that he had been diagnosed with COPD, a chronic respiratory disease caused by smoking that has no cure. He encouraged his followers to stop smoking.
Read next: This Is How the New Spock Said Goodbye to the Old Spock
Listen to the most important stories of the day.
More Must-Reads From TIME
- Elliot Page: Embracing My Trans Identity Saved Me
- How Safe Is India's Railway Network?
- The 'Dopamine Detox' Is Having a Moment
- Column: How the World Must Respond to AI
- What the Debt Ceiling Deal Means for Student Loan Borrowers
- LGBTQ Reality TV Takes on a Painful Moment
- What NASA Can Teach SpaceX About Protecting the Environment
- The Best Movies of 2023 So Far