Leonard Nimoy's Spock taught us to think about the pros and cons of unrestrained emotion versus pure logic, and he taught us to value intelligence and knowledge. Leonard Nimoy, the man, was a poet and a musician as well as an actor. One of my favorite quotes from him is: "The miracle is this: the more we share, the more we have."
Of course, people are already putting together tribute videos to him, and there are lots to choose from, but this 2011tribute to Leonard Nimoy and William Shatner felt right (possibly because the song Moon River has always felt so bittersweet to me, but also because William Shatner and Leonard Nimoy. Kirk and Spock will always be linked in my mind, Kirk was always at his best when he had Spock by his side):
And one more (from 2013), with clips of Spock and Kirk together:
Rest in peace, Leonard Nimoy. Thank you for all the smiles and all the years.