Sagan based a large amount of his career around discrediting the idea that science was cold and impersonal, and as such, he included many of these in his work.
In an episode of Star Trek: Enterprise, the characters land at Carl Sagan Memorial Station on Mars. The memorial at the station carries a particularly good quote of Sagan's.
"Whatever the reason you're on Mars, I'm glad you're there, and I wish I was with you."
In late 1975, Sagan personally invited a young Neil Degrasse Tyson, who was applying to college at the time, to discuss whether Cornell University would be right for him. Afterwards, he gave him an autographed book, and because it was very snowy, offered his phone number in case Neil needed help getting home.